Fact 1: Gravity pulls objects towards planets.

Fact 2: Gravity is the force that keeps planets in orbit around the sun.

Given the two facts above, answer the question "What pulls objects around the sun?" with the following options: 
- Oxygen
 - cycles
 - wind
 - Energy.
 - energy
 - Gravity
 - h2o
 - Atmosphere


 

      Gravity   