What are 3 reasons a virus is considered non living ?

Viruses cannot reproduce on their own unlike parasites
Viruses also do not possess a cell membrane or metabolise on their own
Viruses also doesn’t need to consume energy to survive nor its able to regulate its own temperature.

First reason Viruses don't have any cells, like living organisms do.  second reason is Viruses can't produce new proteins, DNA, or RNA and therefore are unable to reproduce on their own. third reason Viruses have no metabolic activity. They don't use or convert energy and have no ongoing interior processes

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