How does the cobra egg that Rikki-tikki carries in his mouth help move the plot forward?

Rikki-tikki carries the egg to draw Nagaina away from Teddy and the family, giving him a chance to confront her. The egg is not food or a weapon; it acts as a lure. Therefore, the choice saying he uses it to tempt Nagaina away from Teddy is correct.

AI-written and checked against the verified answer.