What term is used to describe areas that are fairly saturated and boggy with water, commonly during glacier runoff?

The correct term to describe areas that are fairly saturated and boggy with water, especially during glacier runoff, is wetlands. Wetlands are ecosystems that are characterized by the presence of water, either permanently or seasonally, and they support vegetation that is adapted to wet conditions. This characteristic makes them essential for biodiversity, water filtration, and providing a buffer against flooding.

Floodplains refer to areas adjacent to rivers that are prone to flooding but are not necessarily saturated like wetlands. Braided drainage describes a river system that divides into multiple channels, which is a different hydrological feature and does not directly refer to water-saturated areas. Marshes, while a type of wetland, specifically refer to wetlands that are dominated by herbaceous plants rather than woody plants and do not encompass the broader definition of wetlands.