Which of the following allergens is associated with asthma attacks?

Grass pollens are recognized as common allergens that can trigger asthma attacks, especially during specific seasons when their pollen counts are high. In sensitive individuals, exposure to grass pollen can lead to an inflammatory response in the airways, resulting in symptoms such as wheezing, coughing, and shortness of breath. This is particularly relevant in regions where grass pollen is prevalent, and individuals who are allergic may experience exacerbations of asthma during the spring and summer months when grass pollination occurs.

While other allergens and environmental factors listed may also play a role in asthma triggers, grass pollen is specifically linked with seasonal allergic rhinitis, which in turn can worsen asthma symptoms. Perfumes and sulfite food preservatives may cause reactions in some individuals, but they are not as universally recognized in the context of asthma triggers as grass pollen. Weather changes can influence asthma indirectly through factors like humidity or temperature fluctuations but are not categorized as allergens themselves. Therefore, grass pollens are the most direct association with asthma attacks in this context.