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 ball slows because friction acts between the rolling ball and the grass, opposing its motion. This friction reduces the ball’s speed until it stops. Gravity pulls the ball downward, but does not by itself stop its forward motion; air resistance can also slow the ball, but friction with the grass is the best explanation here.

AI-written and checked against the verified answer.