Introduction:
In this question, we are asked to identify the season in which we wear a shawl, cap, gloves, and sweater. The correct answer is option 'B', which represents winter. Let's understand why we wear these clothing items during the winter season.

Reasons for wearing shawl, cap, gloves, and sweater in winter:
1. Shawl: A shawl is a large piece of fabric that is worn over the shoulders, neck, and upper body. It provides warmth and insulation in cold weather. The shawl helps to trap heat close to the body, keeping us warm during the winter season.

2. Cap: A cap or hat is worn on the head to protect it from the cold. During winter, a significant amount of heat is lost through the head. Wearing a cap helps to retain body heat by covering the head and preventing heat loss.

3. Gloves: Gloves are worn on the hands to keep them warm in cold weather. Our hands are exposed to the cold temperature, and wearing gloves provides insulation and protection from the cold. It helps to maintain body temperature and prevents discomfort caused by cold hands.

4. Sweater: A sweater is a knitted garment worn on the upper body. It is designed to provide warmth and insulation. Sweaters are made of wool or other warm materials that help to trap body heat and keep us cozy during the winter season.

Conclusion:
During the winter season, we wear a shawl, cap, gloves, and sweater to protect ourselves from the cold weather. These clothing items provide insulation, help retain body heat, and keep us warm and comfortable.