Step 1 : Introduction to the question "6. This type of ball acts as a repellent."
...1. Cotton ball 2. Baseball 3. Screw ball 4. Moth ball Moth balls are equipped with a chemical pesticide called naphthalene (older types), or 1,4-dichlorobenzene (newer types). Camphor, which repels insects, can be used too. They are used in the storage of clothing and other things which can be damaged by both mold, moths and moth larvae like Tineola bisselliella.
