Which two types of matter are pure substances? A homogenous mixtures and elements B solutions and compounds C elements and compounds D mixtures and elements

elements and compounds

Explanation:

Pure substances contain the same type of particles in the substance. All the component particles in a pure substance have exactly the same composition and are present in exactly the same proportion.

An element consists of atoms of the a particular element in a specified arrangement. A compound is composed of atoms of elements joined together in a unique way and that arrangement is maintained throughout the substance. Hence these are pure substances.

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

answer///carbon;