Which of the following elements is not a micronutrient?

boron

calcium

chromium

manganese

Calcium is an essential macronutrient for the construction and maintenance of bones and teeth, and is very important for muscle contraction and transmission of nerve impulses.

Because it is widely used by the body, it is essential that calcium is ingested in adequate quantities, especially during childhood, as it is at this stage of life that bones and teeth form, which in the future may function as a reserve of calcium in cases of disability.