A man feels unpleasant due to humidity and heat. The reason for this is:

Detailed Solution:

The correct answer is “Sweat does not evaporate due to humidity”.

Our body cools down through a process called perspiration or sweating. When sweat evaporates from the skin, it takes heat with it, cooling the body.

High humidity means there's already a lot of water vapor in the air, which slows down the evaporation of sweat from your skin. As a result, your body's cooling system becomes less efficient, making you feel hot and uncomfortable.