Answer:
B i did that to and got it right!
I am guessing an Ecological Relationship as it is dependent on it's environment
the answer is mitochondria
Emperor penguins need lungs to breathe. In penguin lungs, air never stops. ... Once the air goes farther into the trachea it splits into two different directions into both lungs. To get the oxygen into the blood cells, it must come "within small distance of the penguin blood cells".