Explain how equilibrium supports this AQA GCSE Chemistry objective: state that concentrations of reactants and products remain constant at equilibrium.

A strong answer should state the relevant chemistry idea, explain how it applies in Equilibrium, and finish by linking back to Reversible reactions and dynamic equilibrium.

This answer is correct because it directly supports the approved learning objective: State that concentrations of reactants and products remain constant at equilibrium. It stays inside Equilibrium, uses equilibrium as the revision focus, and gives the Chemistry reasoning needed for an exam-style response.