Chemistry question about chemical equilibrium

Question

Why is a chemical equilibrium considered a dynamic equilibrium?

1. Because both forward and reverse reactions continue, even though there is no net change.
2. Because there is no net change in the concentrations of reactants and products at equilibrium.
3. Because the forward reaction occurs faster than the reverse reaction.
4. Because the reverse reaction occurs faster than the forward reaction.
5. Because both the forward and reverse reactions stop at equilibrium.

Answer 1

Because both forward and reverse reactions continue, even though there is no net change.

It is dynamic, as opposed to static, because even though concentrations are not changing at equilibrium, the forward and reverse reactions are still taking place.