Final answer:
Cheyenne is least likely to apply ice to the chest and neck.
Step-by-step explanation:
Cheyenne is least likely to apply ice to his chest and neck to help Joseph with heat exhaustion. While providing shade, cool water, and a drink of water are effective ways to help someone experiencing heat exhaustion, applying ice to the chest and neck may cause vasoconstriction and could potentially worsen the condition.
Learn more about heat exhaustion