You are presented with the quiz "What determines the amount of daylight earth gets? " 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "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". 

So, what's the best answer to the question?


 

    The tilt of the axis       