Final answer:
Gases differ from liquids in that they have no definite shape or volume, have lower density, and can significantly compress and expand with pressure changes.
Step-by-step explanation:
How do gases differ from liquids? The correct answer to this question is (c) Gases have indefinite shape; liquids do not. Unlike liquids, gases have no definite shape or volume and will expand to fill any container they are in. Liquids, on the other hand, have a definite volume but will take on the shape of their container.
Additionally, gases have much lower density compared to liquids and can be compressed or expand significantly based on pressure changes, which is not the case for liquids.