NO LINKS: Which of the following best demonstrates Newton's Third Law? Gravity is a force pulling down on you.

The ahrder you hit a volleyball the faster it will get over the net

Air resistance slows down a parachutist

Your foot pushing on the floor and the floor pushing back

The best demonstration that applies to Newton's Third Law of motion would be D) When you walk your foot pushes down on the ground while the ground pushes back on your foot.

Newton's Third Law states that for every action, there is an equal and opposite reaction. This is actually explains that forces come in pairs and forces are an interaction between two objects. As per the correct option given in the question explains Newton’s Third Law.  

When you walk your foot (say object A) pushes down on the ground while the ground (say object Q) pushes back on your foot with the same force but in the opposite direction.

the answer to this is proletariats.

hope this : )