Answer:
The similarity that you see in bone structure of above animals is a good example of homologous structure because this similarity is caused by existence of a similar structure, but the similarities between the wing of the pelican and wing of the bat is called analogous, because these similarities is caused by similar functions
Step-by-step explanation:
The forelimbs present in vertebrae such as human, cat, whale and bat have similar structures. This shows that they have a common ancestor. Homologous structures can be described as structures which are similar which shows that they might have arisen from the same ancestor.
Analogous structures can be described as the presence of structures in different organisms which are able to perform similar functions. For example, the wings of a pelican and the wings of a bat.