All planets can support life; moons cannot. All planets have atmospheres; moons do not. All planets orbit the Sun; all moons orbit planets. All planets are larger than all moons.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What is the main difference between planets and moons in our solar system?
Possibilities:
- All planets can support life; moons cannot.
- All planets have atmospheres; moons do not.
- All planets orbit the Sun; all moons orbit planets.
- All planets are larger than all moons.

All planets orbit the Sun; all moons orbit planets.