Answer:
The correct answer will be- Carbon, hydrogen and oxygen.
Step-by-step explanation:
The living organisms are derived from the basic matter of life called atoms which together form molecules. These molecules are comprised of elements like carbon, hydrogen and oxygen, sulfur, nitrogen and many others.
The most abundant elements in the organism are hydrogen, oxygen and Carbon as they produce almost all major biomolecules of the living organism.
Thus, Carbon, hydrogen and oxygen is the correct answer.