Final answer:
Pneumonia is the disease considered destructive as it involves the alveoli in the lungs being inflamed and filled with fluid, inhibiting gas exchange.
Step-by-step explanation:
Among the diseases listed — atelectasis, edema, pneumonia, and osteoporosis — the one considered a destructive disease of the respiratory system is pneumonia. In pneumonia, the alveoli become inflamed and fill with fluid, inhibiting gas exchange. This condition is primarily caused by viral or bacterial infections.
Unlike pneumonia, osteoporosis is a disease that affects the bones, leading to fractures, and while it can lead to complications that affect the respiratory system, it is not a disease that directly destructs respiratory tissues unlike pneumonia which directly impacts the lung's ability to function.