Question

Which structure has changed position in whales over a long period of time.

a. tail
b. dorsal fin
c. mouth
d. blow hole

Answer 1

The answer to ur question is b

Answer 2

I THINK ITS B. THE DORSAL FIN

Explanation:

Because all fish and different Marine animals

have it in different spots of he/she's body

Hope I helped SORRY if you get it wrong