Question

what are useful to us
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Answer 1

• These four key elements of food, water, sleep and oxygen are vital to your survival. If you skip food, don't drink enough water or get enough sleep, you are putting yourself in danger and such actions can seriously damage your health. Try to retain a balance in your life and equip your body with these essentials.

Answer 2

• These four key elements of food, water, sleep and oxygen are vital to your survival. If you skip food, don't drink enough water or get enough sleep, you are putting yourself in danger and such actions can seriously damage your health. Try to retain a balance in your life and equip your body with these essentials