Final answer:
Among the options listed, only 'solid' is a state of matter. A solution and a suspension are types of mixtures, and a precipitate is a solid that forms within a solution during a chemical reaction.
Step-by-step explanation:
The states of matter typically refer to four distinct phases: solid, liquid, gas, and plasma. However, in your question, you've listed: solid, solution, suspension, and precipitate. The only listed option that is a state of matter is solid. A solution is a type of homogeneous mixture where one substance is dissolved in another. A suspension is a heterogeneous mixture where particles are dispersed in a medium but will settle over time. A precipitate is a solid that forms within a solution during a chemical reaction.
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