What can trigger allergic reactions?

The correct answer identifies that any specific allergens can trigger allergic reactions. Allergens are substances that can provoke an allergic response in susceptible individuals, and they can come from a variety of sources. This includes food items, plant pollen, medications, pet dander, dust mites, mold spores, insect stings, and many other environmental factors.

Recognizing that allergic reactions can arise from a wide range of triggers is essential for understanding how allergies work and for effectively managing symptoms. Each person may react differently to specific allergens based on their individual immune responses, and what is a trigger for one person might not affect another.

The other choices limit the scope of potential triggers, suggesting that only food, only pollen, or only medications can provoke allergic reactions. Such limitations do not reflect the diverse nature of allergens and thus do not encompass the full range of factors that can lead to allergic responses in the general population.