You are presented with the quiz "What can cause plants to receive less energy" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the Earth being tilted on its axis causes ones side of the Earth to receive less energy from the Sun than the other side" and "plants obtain their energy from the sun". 

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


 

        the Earth being tilted   