Which are common signs of heat exhaustion?

Heat exhaustion occurs when the body loses an excessive amount of water and salt, primarily through sweating, which can happen during prolonged exposure to high temperatures or strenuous activity in hot weather. Recognizing the signs is critical for preventing further progression to heat-related illnesses, such as heat stroke.

The correct choice highlights a comprehensive list of symptoms typically associated with heat exhaustion. Heavy sweating is a common initial sign as the body attempts to cool itself. Weakness, dizziness, nausea, and headaches are also prevalent as the body struggles to maintain normal physiological functions when dehydrated and overheated.

Each of these symptoms represents a response to the body's inability to regulate temperature effectively. Weakness may stem from a loss of electrolytes, dizziness can be attributed to dehydration and reduced blood volume, while nausea and headaches are consequences of the body’s overall distress. Recognizing this combination of symptoms is crucial for prompt intervention, such as moving the individual to a cooler place, providing hydration, and monitoring their condition.

The other options, while they may describe symptoms related to heat stress, do not encompass the full range of indicators typical of heat exhaustion like the chosen answer does.