Question

mention the agent exerting the force and the effect .
A person diving into the swimming pool

Answer 1

The agent exerting the force is water.

A diving person falls into the water by the gravitational pull.

Once inside the water, the gravitational pull is overcame by the buoyancy of the water.

This results into an unbalanced force which prevents one from reaching the floor of the swimming pool.

The buoyancy of water equals the upthrust. Upthrust is the force exerted by a fluid on a body once the body displaces some fluid.