Final answer:
Swamps are wetlands that are constantly submerged in water and contain trees.
Step-by-step explanation:
The type of wetland that is constantly submerged in water and contains trees is a swamp.
A swamp is a type of wetland where the soil is permanently saturated with water and there is a continuous cover of trees or woody vegetation. Swamps are characterized by slow and steady water flow, creating a suitable environment for trees to grow.
Examples of trees found in swamps include cypress, black spruce, and mangroves.