Question

a link between the living and non living is provided by

Answer 1

It is provided by door

Answer 2

Since the options are not given, I am giving a general answer.

The correct answer should be - Viruses.

Viruses are considered to be the gray area that connects the living and the non-living beings.

Like the non-living things, they cannot replicate on their own. But when present inside a live host, they can replicate like the living things.