Question

the diagram illustrates which evolutionary concept? a gene flow b genetic drift c allele jumping d genetic specialization

Explanation:

The diagram shows immigration (movement of individuals) leading to a change in gene frequency (increase in brown genes). Gene flow is the transfer of genetic variation from one population to another (via migration, etc.). Genetic drift is random change, allele jumping is not a recognized evolutionary concept, and genetic specialization is not related to this scenario. So the correct concept is gene flow.

Answer:

A. gene flow