Why are horses and donkeys considered different species even though they can interbreed?

A) because horses and donkeys are not morphologically similar

B) because they came from different ancestors

C) because their offspring are infertile

Answer: C) because their offspring are infertile

Explanation:

A species can be define as the group of members which are capable of inbreeding and producing viable fertile offspring. The members of two distinct species can inbreeding but they cannot produce viable fertile offspring. The offspring will be infertile.

According to the given situation, the horses and donkeys are considered as different species even though they can inbreed as they are incapable of producing fertile offspring.

C because their offspring are infertile