Anegatively charged rubber rod can pick up small, neutrally charged pieces of paper by a process called

A negatively charged rubber rod can pick up small, neutrally charged pieces of paper by a process called INDUCTION.

In conclusion, a negatively charged rubber rod can pick up small, neutrally charged pieces of paper by a process called INDUCTION.

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its c its is a mixture of gases

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.