Students research unicellular, prokaryotic
organisms that live in harsh environments such as volcanic hot springs,
brine pools, and anaerobic black organic mud. which of these groups are
the students most likely researching?
archaebacteria
eubacteria
plantae
protista

Archaebacteria is the right answer. 
They are currently known as Archaea, name"Archaebacteria" is a bit outdated. These unicellar prokaryotes were discovered relatively recent (in 70ties).

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

Aliving thing consumes berries on a yree