One way calcium carbonate and magnesium silicate are alike is that both - A.
contain four atoms of oxygen
B.
are made of only nonmetal elements
C.
have three different eleinents
their formulas
D.
o
have five atoms in each one of their molecules

C. have three different elements in

their formulas

Explanation:

Calcium carbonate and Magnesium silicate are two inorganic chemical compounds with the chemical formula: CaCO3 and MgSiO3 respectively. Using their chemical formula as a basis, CaCO3 consists of atoms of three different elements i.e. calcium element (Ca), carbon element (C) and oxygen element (O).

On the other hand, MgSiO3 also contains the elements: Magnesium (Mg), silicon (Si) and oxygen (O). Based on the elemental composition of both inorganic compounds, it can be observed that similarly BOTH HAVE THREE DIFFERENT ELEMENTS IN THEIR FORMULAS.

the answer will be a) proteins i believe

answer; cnidarians;