Fact 1: The moon revolving around the Earth causes the phases of the moon.

Fact 2: Lets start our discussion of the Moon's phases with the New Moon phase.

Given the two facts above, answer the question "the moon revolving around the Earth causes what?" with the following options: 
- friction
 - energy
 - colors
 - Energy.
 - cycles
 - our star
 - new moon
 - heat


 

       new moon  