Question: Which statement best compares gravity on the Moon to gravity on Earth?

  Options: 
 A. Gravity on the Moon is greater because it is closer to the Sun.
 B. Gravity on the Moon is less because it is smaller than the Earth.
 C. Gravity on the Moon is less because it has less atmosphere than the Earth.
 D. Gravity on the Moon is greater because it has less mass than the Earth.
Answer: B