A _____ is an area that is regularly saturated by surface water or groundwater and is characterized by a prevalence of vegetation that is adapted for life in saturated soil conditions.

• A. Desert
• B. Grassland
• C. Savanna
• D. Wetland

Answer: (D)

Wetlands are areas regularly saturated by surface water or groundwater, with vegetation adapted to living in saturated soil conditions. This persistent or frequent water presence creates hydric soils that are low in oxygen, which selects for plants such as cattails, reeds, and other species that tolerate saturated, anoxic conditions. The combination of regular saturation and specialized vegetation defines wetlands and supports unique wildlife and ecosystem functions like flood mitigation and water purification. Deserts are dry and lack regular saturation, so their plants are adapted to drought. Grasslands and savannas are not typically waterlogged and are dominated by grasses adapted to well-drained soils and seasonal rainfall rather than saturated conditions.