What could "triggers" include in relation to asthma conditions?

The correct choice identifies triggers for asthma as environmental factors such as pollen and dust. Triggers refer to various elements that can provoke or worsen asthma symptoms, leading to inflammation or constriction of the airways. Pollen from trees, grasses, and weeds, as well as dust mites, are common allergens that can cause asthma attacks in sensitive individuals.

While medications like aspirin can also influence asthma, particularly in individuals with aspirin sensitivity, they are specific triggers for a subset of patients rather than the broader population. Exercise is known to induce asthma symptoms in some people, particularly in cold, dry air, but it is not a universal trigger like pollen and dust, which commonly affect a wider group. Weather conditions can also affect asthma symptoms but are generally less specific than direct environmental allergens such as pollen and dust. Weather variations can interact with other triggers but don’t serve as direct or consistent triggers on their own. Therefore, the identification of pollen and dust as triggers encompasses a critical understanding of commonly known asthma exacerbators.