Question

What is the most common element found in the human body? Why is it so
common?

Answer 1

Oxygen... Oxygen is the most common element in the human body, comprising approximately 65.0% of body mass. Most of the oxygen present is found in the form of water.

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Answer 2

Sample Respond: Oxygen is the most abundant element in the human body. It makes up 65 percent of the total weight of a person. For a person with a weight of 155, about 94 pounds of her total weight would be made of the element oxygen. This is due mainly to the body's water content.

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I got 100 %