The radar detects precipitation through signal.<span> It sends a signal out and that signal bounces off objects like the water drops in the air. The radar detects this return signal and sends out another signal. </span>
<span>It absorbs and protects us from ultraviolet radiation from the sun </span>
The correct answer of the given question above would be option D. The hypothalamus is involved in sleep as a response to decreasing light, the hypothalamus suprachiastmatic nucleus causes the pineal gland to increase production of melatonin. The hormone melatonin is responsible for maintaining the circadian rhythm of the body.
