a) Fibres are converted to yarns by the process called spinnig. So, the statement is true.
b) Spinning is the process of converting fibres into yarns by twisting fibres into long threads using different tools. So, the statement is false.
c) Jute is obtained from the stem of jute plant. So, the statement is false.
d) The process of separation of cotton fibres from seeds is known as ginning. So, the statement is true.
e) Weaving is the process of converting yarns into fabrics by joining or interlacing two or more different yarns together. So, the statement is true.
f) Silk is obtained from the cocoon of silkworms. So, the statement is false.
g) Polyester is made in the laboratory using chemicals. It is a synthetic fibre. So, the statement is false.