Based on the context and the answer, generate a question. 

Context: Last year , when I stopped carrying an umbrella it rained so rarely , my allergies were hardly noticeable . This year , uh . Mold is # 1 with a bullet on the allergy list ( dust is # 2 ) , although there are also some autumn spores that get me .

Answer:

Because mold activates the writer 's allergies .



Why is mold # 1 with a bullet on the allergy list ?