I believe the answer to be developing nations. D. Thank you.
Answer:
There are not too many disadvantages of endoskeleton .
This is why most large animal around have them.
one large animal has one of the vunerability animals face without exoskeleton.
Explanation:
<h3>Hope it helps you...</h3>
<h3>thank you..</h3>
More because if the condition changed it would not be the same like it was before it was changed.
Zygote, cleavage, blastula, gastrula
