Its is an aerobic excerisice
The location that should have lowest oxygen concentration would be the tissue because it is the furthermost location.
Other location with lowest oxygen concentration should be in the right part of the heart. It is when all unoxygenated blood pooled before going to the lungs. But the left part of the heart will have highest oxygenated blood, so it's ambiguous.
High oxygen concentration should be found in the environment, lungs, and the blood.
The answer is low light intensity! I hope this helps!
Answer:
They are classified into three orders: frogs and toads, salamanders and newts, and caecilians.
