Explanation: Air is the poorest conductor of heat among the options due to its low density and thermal conductivity, making it an excellent insulator. Paper is a poor conductor but better than air as it is solid. Iron is a good conductor since metals transfer heat effectively.

Explanation: The Bakarwal sheep breed, known for its high-quality wool used in making woolen shawls, is primarily found in Jammu and Kashmir. This breed thrives in the cold Himalayan region, where its wool is highly valued for its warmth and texture.

Explanation: Scouring refers to the process of cleaning the fleece of sheep to remove dirt, grease, and other impurities. It is an essential step in wool processing before the fleece can be used for making textiles.

Explanation: China is the leading producer of silk in the world, contributing the majority of global silk production. India follows as the second-largest producer, but China's dominance in silk production is unmatched.

Explanation: Silkworms are the caterpillars of silk moths. They spin cocoons of silk fibers, which are harvested and processed to produce silk.

Explanation: A clinical thermometer is specifically designed to measure the temperature of the human body accurately.