Biology

The correct answer is: C.They have a common ancestor.

Explanation:

The similar arm bones found in humans, birds, whales, and lizards are a result of homologous structures. These structures have a common origin in a shared ancestor, but they may have evolved to serve different functions in different species due to adaptation to their environments. This is an example of evolutionary divergence, where the bones' structures are inherited from a common ancestor but adapted over time for different purposes (e.g., grasping, flying, swimming, walking).

The other optio...