Answer:
A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet's hydrosphere can be liquid, vapor, or ice. On Earth, liquid water exists on the surface in the form of oceans, lakes and rivers.
Explanation:
Chewing a saltine cracker is a physical change
True-breeding plants have offspring with the same traits when they are self-fertilized.
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I feel as if that Answer is D