What dose gravity measure ?

the acceleration that it gives to freely falling objects.

Explanation:

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the answer is false because not all countries have geysers under their crust. for example, iceland uses geothermal energy because it is available every in their country.  

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.