Name 2 reasons that viruses are not considered living things

Viruses are not considered living because they cannot survive without a host organism, and they do not exhibit the characteristics of life.

Viruses are not considered "alive" because they lack many of the properties that scientists associate with living organisms. Primarily, they lack the ability to reproduce without the aid of a host cell, and don't use the typical cell- division approach to replication.

Cells of an organism tell each other when predators are near.