Please I need help with an explanation..

Thank you!

In each of the examples below, identify an action- reaction pair of forces. kru (a) A tennis racquet hits a tennis ball, exerting a force on the ball. (b) A car is moving at high speed and runs into a tree, exerting a force on the tree. (c) Two cars are moving in opposite directions and collide head-on. (d) A person leans on a wall, exerting a force on the wall. (e) A mass hangs by a string attached to the ceiling, and the string exerts a force on the mass. (f) A bird sits on a telephone pole, exerting a force on the pole