Final answer:
Foods are generally not considered irritants that trigger asthma attacks, unlike environmental factors such as dust, pollen, pet dander, and exercise, which are known asthma triggers.
Step-by-step explanation:
The correct answer to the question “Which of the following is not an irritant for asthma? A. Warm dusty air B. Exercise C. Foods D. Pollen” is C. Foods. Common environmental triggers for asthma attacks include household dust, exposure to pollen, pet dander, changes in weather, and various air pollutants. Also, physical activity can induce exercise-induced bronchoconstriction, a type of asthma triggered by exercise. However, while certain foods can trigger allergies, they are not considered direct irritants that exacerbate asthma conditions in the same way physical and environmental irritants do. It is important to note that food-associated allergic reactions can sometimes lead to an asthma attack if an individual has both asthma and food allergies, but foods on their own are not generally regarded as asthma irritants unless there is an underlying food allergy.