Biology

Answer: C

Explanation: The pineal gland secretes melatonin, a hormone that is highly sensitive to light exposure.
In the absence of light (darkness), the pineal gland increases the production of melatonin, which signals the body to prepare for sleep.
When there is light, the production of melatonin is inhibited.
If the pineal gland is not functioning properly, it can lead to a disruption in the body's ability to adapt to light - dark cycles and sleep - w...