If the amount of daylight changes based on the tilt of the Earth's axis, then what causes the amount of daylight to change?

Answer choices:
- 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        