How did Rikki-tikki come to live with the English family?

Rikki-tikki, a young mongoose, comes to live with the English family after being washed away from his burrow during a rainstorm. He is discovered by a boy named Teddy in their garden, where he is found nearly drowning. The family takes him in, and Rikki-tikki quickly becomes a beloved pet, protecting them from snakes and other threats. His bravery and loyalty solidify his place in their household.