Answer:
because.... they had a constant supply of water. This means building cities and planting farms was much easier than it was in these places than others.
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I believe the correct answer would be behavioral isolation. It is an isolating mechanism where two populations or species cannot mate because of the differences in their courtship and mating behavior. It is also called as ethological isolation.
Igeneous intrustions are created when magma that is trying to get out from under the earth, cools before it reaches the surface and causes geological irregularities. there are 3 types of igeneous intrusions: sills, batholiths, and dykes.
<span>b. competing political parties. </span>