Answer:
This shows that these all have come from similar ancestry because of their analogous structure.
Explanation:
Analogous is defined as body parts that have similar functions but not similar structures like wings in birds, insects, etc.
According to this question, bats, frogs, dogs and crocodiles all possess forelimbs of various shapes. But, those various forelimbs have the same set of homologous bones that are the humerus, the radius and also the ulna.