During hot weather, the fan produces a feeling of comfort. This is because A. Fan supplies cool air B. Fan cools the air C. Our perspiration eva-porates rapidly D. Conductivity of air increases

The correct answer is C. Our perspiration evaporates rapidly.

When we sweat, the water on our skin evaporates, which takes heat away from our body and makes us feel cooler. A fan helps to evaporate sweat by blowing air over our skin. This increases the rate of evaporation and makes us feel even cooler.

Option A is incorrect because a fan does not supply cool air. The air that comes out of a fan is the same temperature as the air around it. However, a fan can make us feel cooler by blowing air over our skin and helping to evaporate sweat.

Option B is incorrect because a fan does not cool the air. The air that comes out of a fan is the

Option D is incorrect because the conductivity of air does not increase when a fan is turned on.