Answer:
A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.
Two examples of forces that cause a change in the shape of an object are:
(i) Rubber ball changes its shape when pressed
ii) Inflated balloon changes its shape when pressed between our palm
