Final answer:
Le Châtelier's principle dictates that an increase in reactant concentration in an equilibrium system will cause the equilibrium to shift toward the products.
Step-by-step explanation:
According to Le Châtelier's principle, when the concentration of a reactant is increased in an equilibrium system, the system will respond by shifting the equilibrium to reduce the concentration of that reactant. Consequently, the equilibrium will shift toward the side with more products to counteract the increase in reactant concentration, thus producing more product. This response is the system's way of re-establishing equilibrium after being subjected to a change in conditions, such as an increase in reactant concentration.