Question

which bio_element makes most of the composition of organism's body​

Answer 1

Answer:

oxygen

Explanation:

Oxygen is the most abundant element contained within living organisms, composing about 65% of the human body.

Answer 2

Answer:

Oxygen

Explanation:

Oxygen is the most abundant element contained within living organisms, composing about 65% of the human body. Oxygen is also the most abundant element in the Earth's crust, and in the air that is essential for most life on Earth. Oxygen's presence in the body is largely in the form of water, which is used to produce the energy within the body needed to sustain life.