Final answer:
The person who exercises regularly is at the lowest risk for developing pulmonary disease. Smoking is the leading cause of preventable respiratory diseases, and regular exercise can improve respiratory health.
Step-by-step explanation:
The person at the lowest risk for developing pulmonary disease is the person who exercises regularly. Avoid smoking is a key factor for maintaining good respiratory health and reducing the risk of pulmonary diseases. Cigarette smoking, whether active or through secondhand exposure, is the leading cause of preventable death in developed countries, greatly increasing the risk of chronic respiratory diseases like chronic obstructive pulmonary disease (COPD). Those who smoke heavily or live in a polluted area, as well as individuals with a family history of pulmonary disease, are at higher risk. Regular exercise can strengthen the respiratory system and improve overall health, potentially mitigating some of the risks associated with environmental factors and genetics.