Why are populations with high levels of gentic diversity more stable than populations with low levels of genetic diversity

answer:

A. Populations with high levels of genetic diversity are more likely to have individuals with traits that help them survive if conditions change.

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the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.