there would be no ecosystem
Alveolar walls are thin to enable the quick passage of oxygen in and out of the lungs. The lungs works hand-in-hand with the heart and also is responsible in converting blood that's de-oxygenated into an oxygenated blood that is usable by the organ systems of the body. The alveolar walls are also designed to have thin membranes so that it can expand and constrict quickly allowing us to breather properly.
It is D. alliteration
Alliteration is when it has the same letter or sound
Septoplasty is the surgical procedure.
Answer: a. increased energy efficiency
Explanation: