Answer:
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It is the variety of life on earth.it is variety within and between all species of plants,animals, and microorganism and ecosystem in which they interect
B). A population changes in response to a change in the environment.
There are omnivores, carnivores, herbivores, and decomposes. Omnivores eat both plants and animals, carnivores eat animals, herbivores eat plants, and decomposers feed on dead material.