Nokea
Which of the following risk factors presents the greatest threat for respiratory disease?
Correct Answer: A
Rationale: Smoking presents the greatest threat for respiratory disease among the given options. Cigarette smoke contains harmful chemicals that can damage the lungs and airways, leading to conditions such as chronic obstructive pulmonary disease (COPD), lung cancer, and other respiratory disorders. Smoking is a well-known and established risk factor for a wide range of respiratory diseases and is considered one of the leading causes of preventable death worldwide. Therefore, quitting smoking and avoiding exposure to secondhand smoke is crucial for maintaining respiratory health.