Question

There is a throat to the ___ living things if the proportion of oxygen in water is reduced.Fill in the blank​

Answer 1

There is a threat to the Aquatic living things if the proportion of oxygen in water is reduced.

Explanation:

We all don't breath from water. Only aquatic living beings do. So, if Oxygen in water is reduced, they will most be affected as we get Oxygen from the air, but they get it from water.