The formation of an ion can best be compared to

A. a person bowling.

B. a pitcher on a baseball team.

C. someone playing soccer.

D. someone looking for a tennis partner.

The formation of an ion can best be compared to (D) someone looking for a tennis player.

Ions are formed when an atom loses an electron (electropositive) or gains an electron (electronegative). The electrons which are lost or gained are looking for some other atom to pair up with so this would be similar to a tennis player looking for a partner.