Why is the fleece of sheep combed?

Burrs  Dust  low quality hairs  None of these

Burrs

The correct answer is option 1. Burrs. The fleece is combed to remove, the burrs (tiny knots). The wool is nicer the less burrs there are. The wool fibers are untangled, dragged to straighten them, and then spun or twisted to form yarn after combing.