The literary topic that Rikki-tikki's actions illustrate is:
C. Courage
In the story, we learn of the challenge that now confronts Rikki-tikki. He is supposed to fight two cobras known as Nag and Nagaina. If he did not fight these cobras, there was a risk to his life and that of Teddy.
Even though he had not done that before, he took courage and fought the cobras. Courage is the ability to do something exceptional and extraordinary. People often praise courageous acts and even reward such actions at times. Rikki-tikki did something exceptional when he fought the cobras.
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