Fill in the blanks:

a. Plant fibres are obtained from ______ and ______.

b. Animals fibres are ______ and _______.

a. The plant fibres are obtained from cotton and jute.

These fibres cotton and jute. are mainly composed plant materials cellulose and lignin.

b. Animals fibres are silk and wool.

Animals fibres like silk and wool are obtained from sheep and other animals.