calcium is not one of the four atoms that make up the bulk of living organisms.
The correct option is C.
<h3>What is living organisms?</h3>
The cells that make up a living thing. Because more cells are produced, the body of the organisms grows as a result of cell division. A live thing that displays the growth process is a tree. Water, pens, and roads are inanimate objects that do not exhibit the growth process.
<h3>What is calcium?</h3>
Although it also plays a critical role in blood clotting, assisting in muscular contraction, controlling regular heart rhythms, and maintaining normal neural activities, calcium is a mineral that is most frequently linked to strong bones and teeth.
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