Which of the following is a common trigger for asthma exacerbations?

Household dust and mold are indeed common triggers for asthma exacerbations. These substances can cause respiratory irritation and inflammation in individuals with asthma, leading to the constriction of airways and increased asthma symptoms. Dust often contains a mixture of various allergens, such as dust mites, pet dander, and mold spores, which can provoke an immune response in sensitive individuals. Mold, in particular, thrives in damp environments and can release spores into the air that are inhaled, further exacerbating asthma.

In contrast, while cold weather and high altitudes can sometimes trigger symptoms in some individuals, they are not as universally recognized as common triggers compared to household dust and mold. Plant-based foods may cause allergic reactions for some people but are not widely considered a general trigger for asthma exacerbations.