Ummm, I think you wanted to add options but something that could be used to help clarify is rereading or finding words that you dont understand and search them in a dictionary.
hope this helps
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I'd say by rounding and similar techniques the answer is 468, though it doesn't say all the needed numbers.
Answer:
Biodiversity keeps the world interesting. There is a greater variety of genes and species in that ecosystem. Great variety of genes and species means the ecosystem is better able to carry out natural processes in the face of external stress. Thus, the ecosystem is more sustainable.
Explanation:
