Which of the following are the three states of matter?

The three fundamental states of matter are solid, liquid, and gas. In a solid, particles are closely packed together in a fixed arrangement, giving it a definite shape and volume. In a liquid, the particles are close but can move past one another, allowing the liquid to take the shape of its container while maintaining a constant volume. In a gas, the particles are far apart and move freely, filling the entire volume of their container and having no fixed shape.

The other options include terms that do not represent primary states of matter. For example, plasma is considered a fourth state of matter, commonly found in stars, while suspension refers to a mixture of solid particles in a liquid that can settle over time. Vapor is often used to describe the gaseous state of a substance that is normally a liquid or solid at room temperature but does not constitute a distinct state of matter on its own. Hence, identifying solid, liquid, and gas as the correct answer is consistent with standard scientific classification of matter.