Which of the following are the symptoms that a pesticide handler may commonly exhibit due to heat stress?

The symptoms that a pesticide handler may commonly exhibit due to heat stress include dizziness, fainting, headache, nausea, chills, and/or fatigue. These symptoms are indicative of the body's response to excessive heat and can occur when a person is working in hot environments, especially when wearing protective clothing that can impede cooling through evaporation.

Dizziness and fainting occur as the body struggles to maintain adequate blood flow and temperature regulation. A headache can result from dehydration or the effects of heat on the body's central nervous system. Nausea often accompanies heat stress as the body tries to cope with increased internal temperature and stress levels. Chills can happen if the body is unable to regulate its temperature effectively; it may react by causing chills even when in a hot environment. Fatigue is a common response to overexertion and prolonged exposure to heat, where the body is working harder than usual to maintain core temperature.

Other options may present symptoms associated with heat-related illnesses, but they do not encapsulate the broader range of common symptoms that are directly linked to heat stress, particularly in the context of a pesticide handler's experience in potentially high-temperature conditions.