Explanation:
nylon, acrylic, polyester = antonyms
bag, cloth, gunny = synonyms
A - True.
"They are not fit to associate with me."
Answer: It means: <em>devoid of intelligence</em>
Use in sentence: "<em>Fatuous means lacking intelligence. When your mother outlaws calling your brother stupid, use fatuous instead."</em>
<em />
Hope this helped!
Dense materials, charged with heat is the answer