human
Question: Which type of force requires contact between two objects for one to push or pull the other?

Choices:
A) frictional forces slowing down a rolling soccer ball
B) the magnetic force pulling paper clips to a powerful electromagnet
C) the magnetic force pushing two magnets apart
D) the force of gravity acting on raindrops that fall to Earth
gpt
The correct answer is 0: frictional forces slowing down a rolling soccer ball.