Answer:
stratovolcanoes are one that frequently erupt
The tundra has trees, some grasses, large animals, and is usually cold. The desert on the other hand, Is usually hot, and has less animal and plant life. Deserts can be cold in some places though.
Protozoa
Ps - a thanks would be appreciated
I think the answer would be flood protection, erosion control, wildlife food & habitat, commercial fisheries
https://www.epa.gov/wetlands/coastal-wetlands
hope this helps