Answered

The four essential elements for life are



a.

carbon, hydrogen, oxygen and nitrogen

b.

carbon, hydrogen, oxygen and sulfur

c.

carbon, nitrogen, oxygen and sulfur

d.

iron, nitrogen, oxygen and magnesium

Verified Answer :

The answer is a
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A. carbon, hydrogen, oxygen and nitrogen
These four elements make up almostĀ 96% of the human body.

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