Answer: Choice A) They all have atmospheres
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Explanation:
Let's go through the four answer choices to see which are true and which are false.
- A) This is true. The gravity from the planet holds the gas atmosphere from escaping into space.
- B) This is false. Only stars make their own light. The light you see from other planets is the reflection of star light, most notably the sun's light.
- C) This is false. Some planets don't have rings of rock and/or gas orbiting around them. Saturn is one planet that does, but Jupiter does not.
- D) This is false for all planets. If you said "terrestrial planets", then it would be true. In general however, a planet like Jupiter is made of gasses and not rock. We consider this a gas giant.
