Question

1._______ maintains the fertility of soil.
2.the biotic elements depend on the ________ for their survival.
3. the _______ is a major source of energy for organisms.
4.________ is the process of making land, water, air , or other parts of the environment dirty and not suitable to use.
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Answer 1

Answer:

1. Organic matter

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Answer 2

Answer:

1 water 2 water 3 Sunlight 4 warming