The wool of a sheep (Ovis aries) primarily comes from the fleece, which is the dense, curly coat that covers the animal's body. This coat is primarily composed of a protein called keratin, which is the same material found in human hair and fingernails. The fleece of a sheep serves various purposes, including providing insulation, protection against weather elements, and camouflage in the wild.
Sheep are shorn periodically, typically once or twice a year, to collect their wool. The shearing process involves carefully removing the fleece without causing any harm to the animal. The wool is then processed to remove impurities, such as dirt and grease, and prepare it for various textile applications.