The most abundant element in the body of living things is: a) Hydrogen b) Nitrogen c) Carbon d) Oxygen

D. Oxygen

Explanation:

Oxygen is the most abundant element in the bodies of living things. For example, oxygen is about 65% of the human body.

Oxygen in the body is mostly in the form of water, since the bodies of living things need water to create energy needed every day.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".