Which of the following are states of matter?

The correct answer, which identifies the states of matter, includes solid, liquid, and gas.

In chemistry, matter exists in several distinct states, with the three most commonly recognized being solid, liquid, and gas. Solids have a definite shape and volume because their particles are closely packed together in a fixed arrangement. Liquids have a definite volume but take the shape of their container because the particles are close together but can move past one another. Gases have neither a definite shape nor a definite volume, as their particles are far apart and move freely, filling the available space.

While "vapor" and "plasma" are related terms, they do not replace the fundamental identification of states of matter. Vapor is often a term used to describe a gas that is in equilibrium with its liquid or solid phase, and plasma refers to a state of matter found at very high temperatures where atoms lose their electrons. "Mist" is a colloquial term that doesn't represent a fundamental state of matter but rather describes tiny droplets of liquid suspended in the air. Therefore, recognizing solid, liquid, and gas as the primary states of matter aligns with the scientific understanding of how substances behave under different conditions.