Who do Nagaina and Kurait try to bite and poison?

Nagaina and Kurait, characters from Rudyard Kipling's "Rikki-Tikki-Tavi," try to bite and poison the young boy, Teddy, and his family. They aim to take revenge on Rikki-Tikki, the mongoose, for disrupting their plans and protecting the humans. Their venomous intentions highlight the ongoing conflict between the snakes and the mongoose in the story.