List at least four beneficial activities of microorganisms

Decomposition - decomposition is something we humans benefit a lot from in agriculture.

Immunity - reffering to the help that bacteria gives us in the immune syste.

Pollution control - reffering to the fact that some bacteria decompose man - made pollutants such as DDT, petroleum, etc.

Symbiosis - reffering to the help some symbiotic bacteria pose to humans by decomposing vitamins B and K.

Hope it helped,

BioTeacher101

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive