Which of the answer choices best describes elements? homogeneous mixtures, always solid, pure substances, very dense.

Option (c) is the correct answer.

Explanation:

An element is defined as the substance that consists of same type of atoms. Also, it can never be broken down or divided into simpler substances.

For example, a sodium metal will contain only atoms of sodium and no other element.

Hence, elements are pure substances because they have only one type of atoms. An element can be present in solid, liquid or gaseous state.

A homogeneous mixture is defined as the mixture that contains even distribution of solute particles into the solvent.

For example, salt in water is a homogeneous mixture.

Thus, we can conclude that pure substances best describes elements.