Fact 1: When the season changes , the amount of daylight will change.

Fact 2: Seasons occur due to the tilt of the Earth's axis and the orbit of the Earth around the Sun.

Given the two facts above, answer the question "What causes the amount of daylight to change?" with the following options: 
- The bending of a ray of light
 - The tilt of Earth's axis
 - movement of tectonic plates
 - The tilt of the sun's axis
 - The brightness of the sun
 - Time change
 - Electrical energy
 - global warming


 

  The tilt of Earth's axis       