Fact 1: The mass of an object causes the gravitational force exerted by that object.

Fact 2: Gravity is the force that keeps the earth in orbit about our sun.

Given the two facts above, answer the question "What causes gravity on the Earth?" with the following options: 
- the Sun
 - friction
 - heat
 - Movement
 - wind
 - ligt
 - quadriceps
 - mines


 

 the Sun        