Explain why the forelimbs of a cat, a bat, and whale would be homologous structures

i believe the answer would be b. hope it : )

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b