When the seasons change from the summer to the fall , the amount of daylight will decrease, and seasons are caused by the tilt of the earth's axis. Given these facts, what determines the amount of daylight earth gets?  among 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     