Which of the following can cause anaphylactic shock?

Anaphylactic shock is a severe and potentially life-threatening allergic reaction that can occur very rapidly after exposure to an allergen. Insect stings are a common trigger for this type of reaction, especially from venomous insects such as bees, wasps, or hornets. When an individual who is allergic to these insect venoms gets stung, their immune system can overreact, leading to symptoms such as difficulty breathing, swelling, rapid heartbeat, and a drastic drop in blood pressure.

The other options, while they may have various health effects, are not typically associated with causing anaphylactic shock. Exposure to cold weather might lead to conditions like hypothermia or frostbite, but it does not trigger allergic reactions. Drinking alcohol can cause allergic reactions in some individuals but is more commonly associated with other types of adverse effects rather than anaphylaxis. Lack of exercise may affect overall health and wellness but does not directly lead to acute allergic reactions. Thus, insect stings are specifically identified as a key causative factor for anaphylactic shock.