Which symptom is typically associated with heat stroke?

Heat stroke is a serious condition caused by prolonged exposure to high temperatures, leading to a failure of the body's temperature regulation system. The typical symptoms associated with heat stroke include hot, dry skin, confusion, rapid pulse, and absence of sweating, indicating that the body's cooling mechanism is overwhelmed.

Among the options provided, reduced sweating is a key symptom of heat stroke. In a state of heat exhaustion or heat-related illnesses, you might observe clammy or pale skin and constricted pupils, but these are not consistent characteristics of heat stroke. Instead, during heat stroke, the skin often becomes hot and dry because the body has stopped sweating. Thus, while clammy skin can be associated with lesser heat-related issues, it is not appropriate to include it in the context of heat stroke.

Constricted pupils can also occur with other conditions and are not indicative of heat stroke. The primary distinguishing feature is the reduction of sweating along with other critical symptoms like elevated body temperature and neurological symptoms. Therefore, the best choice reflects the main symptoms associated directly with heat stroke, which focuses on the lack of sweating and other severe signs rather than including clammy skin or constricted pupils.