Fact 1: The gravitational pull of the Moon on Earth 's oceans causes the tides. Fact 2: Tides are the rising and falling of ocean's water. Given the two facts above, the gravitational pull of the Moon on Earth 's oceans causes water to what?

Pick your answer from:
1). vaporization.
2). mouth of rivers.
3). fall down a hole.
4). rise and fall.
5). Condensation.
6). sink into the crust.
7). disappear forever.
8). It gets heated up.
Answer:
4).