Answer: A. disposal of industrial wastes and household garbage
explanation: B doesn’t make sense and C is air pollution i believe
Slowly extending stretches until the muscle hurts
Gradually increasing the challenge level of stretches
Quickly swinging the arms back and forth for more stretch
<span>Intensely holding stretches for five to 10 seconds</span>
Answer: C. Melatonin.
Explanation: Melatonin is the hormone responsible for sleep and wake cycles. :)
