Animal fibres are made up of​

Animal fibers are fibers from animals and consist mainly of protein. They contain not only silk fiber from silkworms and fur fiber from sheep wool but also collagen fiber extracted from animal skins, chitin from crustaceans, and shellfish like shrimp and chitosan made by deacetylating chitin.

They are generally comprised of proteins, and can be potential reinforcements in composites.

Explanation:

The major-council  from of city government merges executive and legislative functions in a  single group of officials.