Gravity converts solid matter into gases and light energy. Gravity causes gases and dust particles to condense into spheres. Gravity cools gases and liquids until they become one solid mass. Gravity pushes rocks and dust particles outward from a dense center.
I gave my students this multiple choice question: Which of the following statements best describes the role of gravity in the formation of stars?

Only one answer is correct among these 4 choices:
- Gravity converts solid matter into gases and light energy.
- Gravity causes gases and dust particles to condense into spheres.
- Gravity cools gases and liquids until they become one solid mass.
- Gravity pushes rocks and dust particles outward from a dense center.

Could you tell me which one is correct?

Gravity causes gases and dust particles to condense into spheres.