When a system's ____ and outputs are ____, a state of ____ exists within it. In a coastal landscape, this could happen when the ____ at which sediment is being added to a beach equals the rate at which sediment is being ____ from the beach; the beach will therefore remain the same size. When the equilibrium is ____, the system undergoes self-regulation and changes its form in order to restore equilibrium. This is known as ____ equilibrium, as the system produces its own ____ to the disturbance. This is an example of negative ____.

Dynamic Equilibrium

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