Answer:
Your question is not very specific but I wanted to clarify that both bacteria are prokaryotic agents, this means that they lack intracellular organelles such as eukaryotic cells and do not have nuclei wrapped in a envelope that divides them from the cytoplasm, as also happens in eukaryotic cells.
On the other hand, that a bacterium is a unicellular prokaryote is a somewhat inconsistent sentence, since that is why I considered it false, eukaryotic and prokaryotic cells are discovered as a UNIT of life, which is already taken for granted that they are ONE CELL
Eubacteria include within this group the Cyanobatteries that were triggered by the appearance of oxygen in the atmosphere and withstand extreme or difficult climatic situations since in those moments where life originated they also acquired various genetic information by means of horizontal genetic transfer to be more resistant.
As for archaeobacteria, they also have mechanisms to withstand limited environmental situations such as flagella, phospholipid bilayer membranes and regulation of their metabolism.
Explanation:
In summary, according to the question posed, only the option that are prokaryotic organisms and that endure extreme situations is considered reasonable or correct.
