Question

which of the following is an element? salt oxygen sugar water

Explanation:

An element is a pure substance made of only one type of atom. Salt (NaCl) is a compound of sodium and chlorine; Sugar (C₆H₁₂O₆) is a compound of carbon, hydrogen, and oxygen; Water (H₂O) is a compound of hydrogen and oxygen. Oxygen (O₂) consists of only oxygen atoms, so it is an element.

Answer:

Oxygen