The right option is; a. estuary
Estuary is not an example of a wetland
Wetlands are lands that are covered mostly with water, and sometimes marshy and soggy areas. Estuaries are coastal water bodies that are usually located where river water meets the ocean tides (sea). The combination of sea water and fresh water in estuaries provide high levels of nutrients which makes estuaries a productive natural ecosystem, in which unique plant and animal communities can be found. Examples are; the Orange River estuary in Africa, and Drake's Estero in North America.
