15. A mountain divides a population. After many years the organisms show genetic differences from the original population. Which of the following explains how this change occurred?
A. Divergent Evolution B. Convergent Evolution
D. Coevolution
D. Immigration

A

Explanation:

Divergent Evolution occurs when a group of animals emigrates into a new area that is separated by a geographic barrier such as a mountain.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.