Fact 1: Earth orbiting the Sun causes seasons to change.

Fact 2: Similarly, stars are referred to as suns, but our star is the Sun.

Given the two facts above, answer the question "what does earth orbit to cause the seasons to change?" with the following options: 
- Solar energy
 - sunlight
 - wind
 - satellites
 - mars
 - moon
 - our star
 - friction


 

       our star  