Question

reyna kicks a ball, which then rolls across a grassy field. which is the best explanation for why the ball eventually comes to a stop?
the force of gravity pulls the ball down into the grass until it can no longer move
the force of friction between the ball and the grass slows the ball to a stop.
the force from air resistance slows the ball to a stop.
a force is not necessary because all things naturally come to a stop.

Explanation:

When a ball rolls on grass, the primary force opposing its motion is the contact friction between the ball's surface and the grass blades/ground. Gravity acts vertically to keep the ball on the ground but does not directly stop its horizontal motion. Air resistance is minimal compared to surface friction here, and objects do not naturally stop without an opposing force (Newton's first law states objects maintain motion unless acted on by a force).

Answer:

The force of friction between the ball and the grass slows the ball to a stop.