James gently releases a ball at the top of a slope, but does not push the ball. the ball rolls down the slope. which force caused the ball to move downhill?

The ball moved downhill due to the gravitational force.

When the ball is at the top of the downhill the gravitational force is more than the frictional force, this makes the ball come down without pushing it. Gravitational force is the universal force is applicable to all the objects on the earth. The force by which one object attracts other objects. Due to this gravitational force the ball rolls down to ground from downhill without any push.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.