Question

What is the most likely reason that horses and mountain goats have hooves?

Answer 1

Horses have Hoofs Because The hooves help them stand/Run/Ect.
Mountain goats Have hooves cause it helps them walk on a mountain.

Answer 2

The answer is A:  

"They have homologous structures because they have a common ancestor."

Not to be confused with B:

"They have analogous structures because they have a common ancestor."

Good luck!

-RxL