According to Le Chatelier's principle, how does a system in equilibrium respond to a change?

Le Chatelier's principle states that if a dynamic equilibrium is disturbed by changing the conditions (such as concentration, temperature, or pressure), the system will respond by shifting in a direction that counteracts the change, thereby establishing a new equilibrium.

In this context, if a reactant's concentration is increased, the system will shift towards the products to consume some of that added reactant. Conversely, if a product's concentration is decreased, the system will shift toward the products to produce more of the product that has been reduced. Similarly, alterations in temperature or pressure will lead to shifts in the equilibrium position to minimize the impact of those changes.

This principle is crucial for predicting how reactions can be manipulated in chemical processes, making option C the correct answer as it accurately represents the behavior of equilibrium systems in response to external changes.