the Sun the Moon asteroids comets
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Miriam notices when she goes to the beach that sometimes the water rises as high as the pier. At other times of the day, the water barely covers the pillars under the pier. These differences in water level are primarily due to the gravitational influence of which of the following?
Possibilities:
- the Sun
- the Moon
- asteroids
- comets

the Moon