Question

what component of a chemical reaction is highlighted in red? 2h₂(g) + o₂(g) → 2h₂o(g) product subscripts plus reactants

Explanation:

In a chemical reaction, reactants are on the left - hand side of the arrow and products on the right. The highlighted part $2H_2(g)+O_2(g)$ is on the left, so they are reactants.

Answer:

D. reactants