7A. Whales are marine mammals that share a common ancestor with a group of land mammals that includes hippos. Which observation provides
evidence of the shared ancestry of whales and hippos? *
7 points
The fossil record contains many intermediate stages between their early, land
dwelling common ancestor and modern whales and hippos
Hippos are land-dwelling mammals that spend much of the day walking on the
bottom of bodies of water
Whales are classified as mammals even though they have a very sparse amount of
hair on their skin
Whales and other marine mammals are the only groups of mammals to have limbs
that are modified as flippers as well as a streamlined body shape

The fossil record contains many intermediate stages between their early, land dwelling common ancestor and modern whales and hippos.

Explanation:

I would say this one makes the most sense.

B) Hippos are land-dwelling mammals that spend much of the day walking on the  bottom of bodies of water.

This one doesn't explain how the are related so we can cross this out.

C) Whales are classified as mammals even though they have a very sparse amount of  hair on their skin.

Although this is true, it really doesn't prove how they are related to Hippos.

D) Whales and other marine mammals are the only groups of mammals to have limbs  that are modified as flippers as well as a streamlined body shape.

This statement is also true but does not explain how hippos and whales are related in anyway.

This leaves us with A.

what is this for

Explanation: