<span>A </span><span><span>keystone species</span> can cause dramatic changes in the structure of a community.
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Answer:
It will be almost impossible to imprison anyone he has accused.
Explanation:
i took the test
It depends how far back you are talking about. If you are talking back to the 1700s it would be cotton. If you are talking about a time period even father back than that, sorry, I can't help. Hope this helped.