Fact 1: The mass of a planet causes the pull of gravity on that planet.

Fact 2: Gravity is the pulling force that holds objects to the surface of a planet.

Given the two facts above, answer the question "The mass of a planet causes the pulling force that does what?" with the following options: 
- holds objects to its surface
 - deadly and devastating
 - a tree falling
 - principals of aerodynamics
 - causes weather
 - to move people
 - forces air to the surface
 - changes rotations


 

 holds objects to its surface        