You are presented with the quiz "Earth 's tilt on its rotating axis causes _to change" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "earth 's tilt on its rotating axis causes seasons to change" and "because the daylight changes with the seasons, ActiveEarth does, too". 

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


 

 daylight          