Research indicates that using electronic devices before bed may make it difficult for people to fall asleep. the light appears to interfere with the body’s ability to create this hormone, which is responsible for sleep and wake cycles. a. endorphins b. eustress c. melatonin d. progesterone

The correct answer is C.

Melatonin is the hormone responsible for sleep and wake cycles. It helps maintain our circadian rhythm which is our body's natural cycle. Some people do not produce enough melatonin and need to take it as a supplement, especially in certain types of autism.

the answer is a. adolescence

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by going smokefree, you could improve the well-being of your friends, family, coworkers, and even your pets. here’s how the cigarettes you smoke affect the people around you.