"Gravity is a contact force that holds objects down on Earth" best describes gravity.
Answer: Option B
Explanation:
Gravity is the force which attracts two bodies one to the other. It is the force which causes objects in the air to fall to the ground and keeps the planets around the sun in their orbit. The greater an object's mass, the greater its gravitational power.
Gravity declines with elevation, near the Surface of the earth (sea level), so that at one-half of the Earth's radius, linear extrapolation will give zero gravity. The gravity of Planet originates from all of its mass. All its mass causes the whole mass in one's body a collective gravitational pull on.
