You are presented with the quiz "the gravitational pull of the Moon on Earth 's oceans causes water to enter and leave the bay when" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the gravitational pull of the Moon on Earth 's oceans causes the tides" and "ocean tides enter and leave the Bay twice a day". 

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


 

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