Read the passage carefully. Select the answer from the four alternatives given…

Read the passage carefully. Select the answer from the four alternatives given below each question.

The human body can tolerate only a small range of temperature, especially when the person is engaged in vigorous activity. Heat reactions usually occur when large amounts of water and/or salt are lost through excessive sweating following strenuous exercise. When the body becomes overheated and can not eliminate this excess heat, heat exhaustion and heat stroke are possible.

Heat exhaustion is generally characterised by clammy skin, fatigue, nausea, dizziness, profuse perspiration, and sometimes fainting, resulting from an inadequate intake of water and the loss of fluids. First aid treatment for this condition includes having the victim lie down, raising the feet 8 to 12 inches, applying cool, wet cloths to the skin, and giving the victims sips of salt water over a 1-hour period.

Heat stroke is much more serious; it is an immediate life-threatening situation. The characteristics of heat stroke are a high body temperature (which may reach 106° F or more); a rapid pulse; hot and dry skin; and a blocked sweating mechanism, victims of this condition may be unconscious, and first-aid measures should be directed at quickly cooling the body. The victim should be placed in a tub of cold water or repeatedly sponged with cool water until his or her temperature is sufficiently lowered.

Question: Heat stroke is more serious than heat exhaustion because heat stroke victims