Question

which is one of the six fundamental elements that are found in living organisms?

chlorine
sodium
helium
oxygen

Explanation:

Identify the six fundamental elements of life

The six fundamental elements that make up the vast majority of living organisms are commonly remembered by the acronym CHNOPS. These elements are Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulfur.

Evaluate the given options

• chlorine: While important as an ion, it is not one of the six primary CHNOPS elements.
• sodium: Essential for physiological processes, but not one of the six fundamental structural elements.
• helium: An inert noble gas that does not form biological molecules.
• oxygen: One of the core CHNOPS elements, making up a major component of water and organic molecules.

Answer:

• chlorine
• sodium
• helium
• oxygen (Correct answer)