Fact 1: Aplanet rotating causes cycles of day and night on that planet.

Fact 2: Planets move in elliptical orbits.

Given the two facts above, answer the question "When what rotates are cycles of day and night created?" with the following options: 
- helps a species to thrive
 - Something that take eight minutes to travel to the Earth
 - several different ways
 - Changing the angle of the sun
 - chemical compound NaCl
 - just about everywhere on Earth
 - keeping food fresh for long periods of time
 - Something that moves in an elliptical orbit


 

        Something that moves in an elliptical orbit 