The correct answer is option D which is that endocrine control can control melatonin.
<h2>Explanation:</h2>
As melatonin is released from pineal gland which is a part of endocrine system.The endocrine system is a chemical messenger system which has glands, which secretes certain chemicals known as hormones.These hormone acts on different organs to control different metabolisms in body.So melatonin which is hormone can be controlled by the endocrine system.
The alveoli. These little air sacs are found on the end of the bronchioles and are the place where oxygen enters the blood and the carbon dioxide leaves.
