What is the main feature that differentiates Archaebacteria from other bacteria?

Step-by-step solution

These bacteria are special since they live in some of the most harsh habitatssuch as extreme salty areas (halophiles), hot springs (thermoacidophiles)and marshy areas (methanogens). Archaebacteria differ from other bacteriain having a different cell wall structure and this feature is responsible fortheir survival in extreme conditions. Methanogens are present in the gutof several ruminant animals such as cows and buffaloes and they areresponsible for the production of methane (biogas) from the dung of theseanimals.