[Answer] What does 'HD' stand for on a TV?

Step 1 : Introduction to the question " What does 'HD' stand for on a TV? "

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High-definition television (HD or HDTV) describes a television system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since 1936; in more recent times, it refers to the generation following standard-definition television (SDTV), often abbreviated to HDTV or HD-TV.

The term high definition once described a series of television systems originating from August 1936; however, these systems were only high definition when compared to earlier systems that were based on mechanical systems with as few as 30 lines of resolution. The ongoing competition between companies and nations to create true "HDTV" spanned the entire 20th century, as each new system became higher definition than the last. In the 2010s, this race has continued with 4K, 5K and 8K systems.

More Info: en.wikipedia.org

[Ans] In which country is it customary for women to give men chocolate on Valentine’s Day?

Step 1 : Introduction to the question "In which country is it customary for women to give men chocolate on Valentine’s Day?"

While women in the United States often receive chocolate on Valentine’s Day, the custom in Japan reverses the roles. Instead, it is tradition for women to present chocolates to their husbands, boyfriends, and even male coworkers. Men are not expected to reciprocate until a month later, on March 14—known as White Day—when they traditionally return the gesture with gifts often valued at three times what they received. This reciprocal practice has effectively created a two-step holiday economy, extending the season of spending and gift giving.

[Answer] In which country is it customary for women to give men chocolate on Valentine’s Day?

Step 1 : Introduction to the question "In which country is it customary for women to give men chocolate on Valentine’s Day?"

...Women might be waiting for chocolate in America, but the tradition in Japan is for women to do the giving on Valentine’s Day. Women gift chocolates to their husbands, boyfriends, and even male coworkers. Men are not expected to reciprocate until a month later, on March 14—known as White Day—when they traditionally return the gesture with gifts often valued at two to three times what they received. This reciprocal practive has effectively created a two-step holiday economy, extending the season of spending and ritualized exchange.

[Answer] Which English king famously married six different women?

Step 1 : Introduction to the question "Which English king famously married six different women?"

...King Henry VIII of England’s love life was turbulent, to say the least, marked by divorces, executions and dissolutions. He married six different women in his life, ostensibly in pursuit of a male heir. After divorcing his first wife, Catherine of Aragon, he married Anne Boleyn, then Jane Seymour, Anne of Cleves, Catherine Howard, and Catherine Parr. Of these women, only Jane Seymour successfully delivered him a male heir, and she is the only one of his wives buried next to him at St. George's Chapel.

[Answer] Who did Jacqueline Kennedy marry in 1968?

Step 1 : Introduction to the question "Who did Jacqueline Kennedy marry in 1968?"

...Five years after the death of her husband John F. Kennedy, Jacqueline Kennedy remarried. In 1968, Jackie married shipping magnate Aristotle Onassis, taking his last name and becoming “Jackie O.” The couple had known each other for several years, though their relationship grew strained shortly after their marriage. They remained married until Aristotle’s death in 1975.

[Answer] What structure was built by Shah Jahan in memory of his wife?

Step 1 : Introduction to the question "What structure was built by Shah Jahan in memory of his wife?"

...Shah Jahan was the Mughal Emperor of India for 30 years in the 1600s. He had many different wives during his reign, but his most beloved was Mumtaz Mahal, to whom he dedicated the Taj Mahal. The building, located in Agra, India, is actually a mausoleum that was constructed after Mumtaz's death. It is also considered one of the "New Seven Wonders of the World."

[Answer] In 1936, King Edward VIII abdicated the throne to marry what woman?

Step 1 : Introduction to the question "In 1936, King Edward VIII abdicated the throne to marry what woman?"

...Shortly after the start of his reign in 1936, Edward VIII proposed to twice-divorced, American socialite Wallis Simpson, which was problematic. As King, Edward was the head of the Church of England, which disapproved of remarriage after divorce if the former spouse was still alive. But Edward's love for Wallis was deeper than his love for the monarchy, and just 326 days into his reign, he abdicated the throne with his brother George VI (Queen Elizabeth II’s father) replacing him.