Explain how the ineractions between organisms in aan ecosystem can be halpful and harmful to these organisms?

Depends on what relationship the organisms have. Mutual relationships happen when both organisms benefit from the relationship(Fish and anemone). Commensalism is when one organism benefits while the other does not gain or lose anything(oxpeckers on elephants) . Parasitism is non-mutual where one organism (the parasite) benefits from the outdo of another (tick on a dog)

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.