WHICH ARE USEFUL TO US Fungi Protists Eubacteria (Monera) and Archaebacteria?

Fungi are useful to us as they provide food, produce antibiotics, and help in decomposing organic matter. Eubacteria (Monera) are beneficial in processes like digestion, decomposition, and nitrogen fixation. Archaebacteria play a role in extreme environments and are being studied for potential biotechnological applications. Protists have various ecological roles such as being primary producers in aquatic food chains and serving as model organisms in research.