Between ages 2 and 6, instrumental aggression increases in frequency. Over this period, aggression decreases in frequency

Reactive aggression

Explanation:

When children are infants, they do not think as much as they react to stimuli. For this reason they have a relatively high reactive aggression which is the aggression that happens as a result of person responding to a situation that they habor negative feelings about. This is why infants cry so much.

As they grow older however and pass the 2 year mark, they begin to think more about the situations they are in rather than react to it. They can be reasoned with and so they display less reactive aggression.

radiant energy is a form of kinetic energy only.(a)