made of hydrogen and helium. older than other objects in the solar system. the source of most heat and light energy. the strongest source of gravity in the solar system.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The planets in the solar system revolve around the Sun because the Sun is
Possibilities:
- made of hydrogen and helium.
- older than other objects in the solar system.
- the source of most heat and light energy.
- the strongest source of gravity in the solar system.

the strongest source of gravity in the solar system.