Which statement about wetlands is true?

Which statement about wetlands is true?

• A. They release carbon monoxide
• B. They store floodwaters
• C. They provide wildlife habitat
• D. They filter pollutants

Answer: (D)

Wetlands act as natural water filters. As water moves slowly through the wetland, sediments and nutrients settle out, and the roots and soils host microbial life that breaks down or transforms pollutants. This combination directly improves water quality downstream, which is the hallmark ecosystem service these environments provide. That focused cleaning effect is why the statement about filtering pollutants is true and central to understanding wetlands. Wetlands do store floodwaters by absorbing excess rainfall and also provide important wildlife habitat, but when the emphasis is on a direct water-quality benefit, pollutant filtration is the most clearly defining function. And carbon monoxide isn’t a typical emission from wetlands; they’re more commonly associated with gases like methane or carbon dioxide under certain conditions.

Wetlands act as natural water filters. As water moves slowly through the wetland, sediments and nutrients settle out, and the roots and soils host microbial life that breaks down or transforms pollutants. This combination directly improves water quality downstream, which is the hallmark ecosystem service these environments provide. That focused cleaning effect is why the statement about filtering pollutants is true and central to understanding wetlands. Wetlands do store floodwaters by absorbing excess rainfall and also provide important wildlife habitat, but when the emphasis is on a direct water-quality benefit, pollutant filtration is the most clearly defining function. And carbon monoxide isn’t a typical emission from wetlands; they’re more commonly associated with gases like methane or carbon dioxide under certain conditions.