Respuesta :
Answer:
Quietly, patiently or serenely.
Explanation:
The adjective placid means that something is not easily upset or disturbed. As a result, since adverbs describe actions, in the excerpt from "The Monkey's Paw" the adverb placidly is used to describe an action like knitting, thus indicating that the white-haired old lady is knitting in a gentle, peaceful and mild manner.