Question

which scenario demonstrates the application of newtons third law in everyday life? a car parked on a hill a person sitting quietly in a chair a person walking, pushing backward on the ground with their feet a ball falling due to gravity

Explanation:

Newton's Third Law states that for every action, there is an equal and opposite reaction. When a person walks, they push backward on the ground (action), and the ground pushes forward on the person (reaction), enabling movement. A car parked on a hill involves static equilibrium (not an action - reaction pair in the sense of Newton's Third Law for motion). A person sitting quietly in a chair has a normal force balancing weight (static situation). A ball falling due to gravity is mainly about Newton's Second Law ($F = ma$) related to gravitational force causing acceleration.

Answer:

A person walking, pushing backward on the ground with their feet.