Final answer:
Dry ice is classified as a covalent network solid.
Step-by-step explanation:
Dry ice, or solid carbon dioxide, is not classified as a metal or a non-metal. It is actually a covalent network solid. Covalent network solids are made up of atoms that are held together by covalent bonds forming a network-like structure. Since dry ice is made up of carbon dioxide molecules held together by covalent bonds, it falls into this category. Unlike metals and non-metals, covalent network solids have very high melting points and are typically hard and brittle.