orbits of the planets around the Sun rotation of a planet on its axis tilt of Earth's axis phases of the Moon
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Gravity is responsible for the ___.
Possibilities:
- orbits of the planets around the Sun
- rotation of a planet on its axis
- tilt of Earth's axis
- phases of the Moon

orbits of the planets around the Sun