Fact 1: When the seasons change from the summer to the fall , the amount of daylight will decrease.

Fact 2: Seasons are caused by the tilt of the earth's axis.

Given the two facts above, answer the question "What determines the amount of daylight earth gets? " with the following options: 
- Heat energy
 - The darkness it gets
 - The bending of a ray of light
 - The tilt of the axis
 - The tilt of the sun's axis
 - electromagnetic energy
 - The brightness of the earth
 - rain or sun shine


 

    The tilt of the axis     