Question

which of the following is not one of the elements that make up living things?*
oxygen
carbon
mercury
phosphorus

Explanation:

The elements that make up living things are mainly carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), and sulfur (S). Mercury (Hg) is a heavy - metal element and is toxic to living organisms. It is not a fundamental element that makes up living things.

Answer:

Mercury