What ecological process changes a lake to a marsh over a long period of time?

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Succession is the gradual change in species composition over time in an ecosystem. As a lake receives organic matter and sediments, it becomes shallower and the water warms up, providing favorable conditions for the growth of emergent wetland plants. These plants gradually establish themselves in the shallow waters around the edges of the lake, forming a marsh ecosystem. This process can take many years or centuries to occur. Eutrophication (A) is the process by which a body of water becomes rich in nutrients, often leading to excessive growth of aquatic plants and algae. Competitive exclusion (B) occurs when one species outcompetes another for the same resources, leading to the local extinction of the weaker species. Extinction (D) refers to the complete disappearance of a species from an ecosystem or the entire planet. Coevolution (E) refers to the mutual influence of two or more species on each other's evolution, often resulting in specialized adaptations to each other's presence.

What Ecological Process Changes a Lake to a Marsh Over