Why are viruses considered to be nonliving?

Because:

They aren't cells, well not like animal and plant ones. They are just DNA/RNA surrounded by protein

They have no metabolism, they have no energy needs, which makes them unlike living cells

They produce no waste, no energy going in means no energy coming back out again, which is also different to living cells

They don't reproduce by mitosis/meiosis, they can only replicate inside other cells

They don't grow, they stay as they are from birth until death

They don't respond to outside stimuli they just live their happy little lives, oblivious to everything around them

Viruses are considered to be non living because they dont posess nucleus