Diatoms have elaborate shells made of

A) carbon.
B) magnesium.
C) plastic.
D) silica.
E) cellulose.

Elaborate Shells

Complex and intricately designed outer coverings that protect the bodies of certain animals, like snails and turtles.

Silica

A hard, unreactive chemical compound of silicon and oxygen, used in various industries and forming the major constituent of sand.

Diatoms

Microalgae with silica shells, found in almost every aquatic environment and play a crucial role in oxygen production.