When weather conditions are hot and humid, what should an instructor do?

Providing hydration is essential when weather conditions are hot and humid because it helps maintain the body's temperature and prevent heat-related illnesses. High temperatures combined with humidity increase the risk of dehydration, which can lead to serious health issues such as heat exhaustion or heat stroke. Ensuring that students have access to sufficient fluids promotes their well-being and enhances their ability to focus and participate in the lesson effectively.

While the other options may also have some merit in certain contexts, they are not as directly focused on the immediate need for maintaining hydration, which is crucial under extreme heat conditions. Increasing the duration of the lesson, for instance, could exacerbate fatigue and dehydration risks, while holding the class indoors might not be practical or feasible based on available facilities. Reducing physical activity may be necessary depending on the situation, but it does not address the need for hydration directly, which is the most critical response in such weather conditions.