The whale exhibited his component of natural selection. It was said that pre-existing whales had limbs rather than fins.
Answer: shivering; oxygen
Explanation:
The thyroid hormones are produced by the thyroid glands and they're the triiodothyronine and the thyroxine. The thyroid hormones are required in metabolism regulation, performs digestive functions, controls the muscle of the heart, and develops the brain.
If thyroid hormones are not released, you can regulate body temperature by shivering and which requires a greater use of oxygen.
I think the answer is d. uniform habitat... let me know if i’m wrong
