Biology

The forelimbs of a human and a whale are an example of divergent evolution. Divergent evolution occurs when two species with a common ancestor evolve different traits due to different environmental pressures or ecological niches. In this case, humans and whales share a common vertebrate ancestor, and their forelimbs have evolved differently: humans use their forelimbs for grasping and manipulation, while whales' forelimbs have evolved into flippers for swimming. The similar underlying bone structure (homologous structure) is a result of their common ancestry.

For A: This is an example of convergent evolution, not divergent. Both birds and bats developed wings independently to serve the sa...