Gravity
The moon doesn't smash into the earth because the gravity from the earth keeps the moon in orbit around it.
It is gaining potental energy which will then transfer to knetic energy as it falls
I think the answer is repulsive.... Sorry if I get this wrong? :)
A.The swimmer pushes the water
C. the walls force against the ball
Asteroids are located in orbits of other planets such as Mars, and Jupiter. There are belts of asteroids around the solar system "behind mars, and next to Jupiter." They orbit the planets and they also have the "Main Asteroid belt which circles around planets 1-4.
Hope this helps!