Read the following text from "Rikki-Tikki-Tavi" by Rudyard Kipling. Then Rikki-tikki went out into the garden to see what was to be seen. It was a large garden, only half cultivated, with bushes, as big as summer-houses, of Marshal Niel roses, lime and orange trees, clumps of bamboos, and thickets of high grass. Rikki-tikki licked his lips. "This is a splendid hunting-ground," he said, and his tail grew bottle-brushy at the thought of it, and he scuttled up and down the garden, snuffing here and there till he heard very sorrowful voices in a thorn-bush.

It was Darzee, the tailorbird, and his wife. They had made a beautiful nest by pulling two big leaves together and stitching them up the edges with fibers, and had filled the hollow with cotton and downy fluff. The nest swayed to and fro, as they sat on the rim and cried.

"What is the matter?" asked Rikki-tikki.

"We are very miserable," said Darzee. "One of our babies fell out of the nest yesterday and Nag ate him."

What mood does the setting create or evoke?

a mournfulness
b serenity and peace
c restless impatience
d excitement and danger