Explanation

Increased genetic diversity means populations develop more variety in their genes over time. This happens through mutations, sexual reproduction, and mixing of different individuals. Greater genetic diversity helps populations survive changing environments and diseases.

Populations with high genetic diversity have more traits to choose from when facing challenges. If the environment changes, some individuals will have genes that help them survive. These survivors pass their helpful genes to the next generation.

Evolution tends to increase complexity and better adaptation over time, not decrease them. Organisms become less dependent on external resources as they evolve better survival strategies. Genetic diversity is the raw material that makes all evolutionary changes possible.