Question

parts of a reaction
what part of a chemical reaction is highlighted in red?
reactants
products
states of matter
subscripts

Explanation:

In a chemical - reaction equation, the substances on the left - hand side of the arrow are reactants and those on the right - hand side are products. Symbols like (aq) for aqueous, (s) for solid, (l) for liquid, and (g) for gas represent the states of matter. Subscripts are numbers written below the line to indicate the number of atoms of an element in a compound. Since the highlighted part in the example shows (aq) and (g) which are symbols for states of matter.

Answer:

states of matter