Final answer:
None of the options (A to D) given in the question correctly represent an example of analogous structures. Analogous structures are those that have similar functions resulting from convergent evolution but do not share a common evolutionary origin. Bat and bird wings are both homologous and analogous but not the correct answer to the given question.
Step-by-step explanation:
The question asks to identify a pair of analogous structures from the given options. Analogous structures are those that evolved independently to perform the same function due to similar environmental challenges, even though they do not share a common ancestor. They exhibit convergent evolution. From the options provided, the correct example of analogous structures would be the wings of a butterfly and the wings of a bird, however, this option is not listed. Nevertheless, none of the given options (A to D) in the question perfectly fit the description of analogous structures, as bat and bird wings (option A) are examples of structures that are both homologous and analogous; they share a common evolutionary origin but also perform similar functions. Options B and C are examples of homologous structures, while D does not correctly represent analogous structures as grasshopper legs and sea star arms do not perform the same function. Thus, no correct answer is provided in the options.