Can anyone please help with definition of living and non-living. what is that dividing line that divides livings from non-livings.
The answer is that there is no dividing line.
The definition of living vs. non-living is one which is very important to us, and yet nobody has a fully agreed upon line in the sand. Even science, which has entire categorizations for living things, openly admits that all it has is a list of things living things tend to have; it lacks a checklist you can do to test whether something is alive or not.
This is actually a big deal on the edge case: death. Because science doesn't have a solid definition of life, it also does not have a solid definition of death. There are cases we all agree upon (a putrefying corpse is dead), but there are cases we aren't certain about (heartbeat but no brain function, or brain function with no heartbeat).