The correct answer is: a) Cotton.
Cotton is a soft, breathable fabric that is ideal for hot and humid climates. It is also a natural fiber, which makes it hypoallergenic and less likely to irritate the skin. Cotton is also relatively inexpensive, making it a popular choice for clothing and other textiles.
Wool is a natural fiber that is known for its warmth and durability. However, wool can be quite itchy and uncomfortable to wear in hot weather. Silk is a luxurious fabric that is often used in clothing and bedding. However, silk is also quite expensive and can be difficult to care for. Leather is a durable fabric that is often used in shoes and bags. However, leather can be quite hot and uncomfortable to wear in hot weather.
In conclusion, cotton is the best fabric for the traditional Assamese “gamocha” (scarf) because it is soft, breathable, and affordable.