Plz help! i need this asap! thank you!! Read the excerpt below from "Rikki-Tikki-Tavi" by Rudyard Kipling.

When Rikki got to the house, Teddy and Teddy's mother and father came out and almost cried over him. That night he ate all that was given him till he could eat no more, and went to bed on Teddy's shoulder, where Teddy's mother saw him when she came to look late at night.

"He saved our lives and Teddy's life," she said to her husband.

"Just think, he saved all our lives."

Rikki-tikki woke up with a jump, for all the mongooses are light sleepers.

"Oh, it's you," said he. "What are you bothering for? All the cobras are dead, and if they weren't, I'm here."

Rikki-tikki had a right to be proud of himself, but he did not grow too proud, and he kept that garden as a mongoose should keep it, with tooth and jump and spring and bite, till never a cobra dared show its head inside the walls.

What is the theme of this passage? How do you know?

Please write your answer in complete sentences.