Question

consider the elements, listed, found in the human body. which two are major components, making up at least 3% each of the human body?
☐ selenium
☐ magnesium
☐ nitrogen
☐ carbon
☐ cobalt

Explanation:

To determine the major components (≥3% of human body), we recall elemental composition: Carbon (C) makes up ~18%, Nitrogen (N) ~3%. Selenium, magnesium, cobalt are trace elements (<3%). So nitrogen and carbon meet the ≥3% criterion.

Answer:

• nitrogen
• carbon