Answer :
Wearing a coat in winter is an effective way to keep warm due to its ability to reduce heat loss from the body, not generate its own heat. Let's explore why option D. It reduces heat loss through convection and radiation. is the best answer.
Heat Retention: Our bodies naturally generate heat, and a coat helps retain this heat by serving as a barrier. It limits the transfer of heat from your body to the colder outside environment.
Convection and Radiation:
- Convection: It reduces heat loss through convection by trapping a layer of warm air close to your body. This air barrier minimizes the movement of cold air across the skin, cutting down on the heat loss that would occur if the air were freely circulating.
- Radiation: The coat also reduces heat loss through radiation by reflecting some of the body heat back toward you. This is particularly effective if the coat has insulating materials like down feathers or synthetic fibers designed to reflect heat.
Insulation Property: Many coats are designed with materials that offer high insulation properties. The fibers trap air, making it difficult for heat to escape, thus maintaining warmth.
In conclusion, wearing a coat helps keep you warm in the winter by minimizing the ways heat can escape from your body, mainly through reducing losses via convection and radiation. This is why option D is correct.
