Answer:
B. archaea.
Step-by-step explanation:
The archaea are a group of organisms which are prokaryotes (does not have a definite nucleus and membrane-bound cell organelles) and are physically similar to bacteria. However, archaea are distinct from both Bacteria and Eukaryotes. They found in extreme environmental conditions such as extreme temperature, pH, saline and acidic. That’s why they are called extremophiles.