Answer:
its definitely c because the past ancestors of ours never layed eggs nor did dogs, plus we were never reptiles and lastly, dogs and humans are both mamals and give live birth so their more related than snakes and humans. hope this helped.
I believe your pointing to number 16, I believe the answer is B
Yes. They are aquatic animals.
The very primitive organism is the oldest because, over time, organisms gradually evolved into more complex organisms. First came the primitive organism, then it evolved into the more complex one, or the younger fossil.
