Freshwater ecosystems include three general categories: rivers and streams, lakes and ponds, and freshwater wetlands. Which of the following describes freshwater wetlands, but not the other two categories? Select all correct answers.
A. The ecosystem soaks up heavy rainfall, which helps to prevent flooding.
B. Water flows in one direction only through the ecosystem.
C. Water may cover the soil or lie just under the surface, for at least part of the year.
D. The ecosystem may be a freshwater bog, a marsh, or a swamp.

Water may cover the soil or lie just under the surface for at least part of the year ( C )
The Ecosystem may be a freshwater bog, a marsh or a swamp ( D )

Freshwater wetlands are freshwater ecosystems that are affected/created either permanently or temporary by flooding/heavy rainfall. and they include ; Marshes , swamps, pothole and floodplains these different types habitats are aquatic in nature.

And some of the functions of freshwater wetlands are ;

regulation of the quality of water flow into various freshwater ecosystems
they are habitats to migratory organisms
provide refuge for some aquatic organisms during drought

Hence we can conclude that the description for freshwater wetlands are Water may cover the soil or lie just under the surface for at least part of the year ,The Ecosystem may be a freshwater bog, a marsh or a swamp

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