the answer

Which argument correctly applies Newton's second and third laws to explain why it is easier to walk on solid ground than on the beach? Walking on solid ground, you create a substantial friction force that in turn implies a large equal and opposite force that moves you forward. Walking on sand, the force of gravity is not balanced because the sand can move and you sink in. You must compensate for the reaction force upward. O Walking on the beach, the force of your foot is used to accelerate sand, not to move you forward