Many elephants are killed for that. Elephants tusks are ivory. They use them to gather their food, dig for roots, and strip bark. Elephants have trunks too. They use their trunk to drink water, breathe, and gather food.
Elephants can swim under water because they use their trunks as a snorkel.
Elephant's trunks are just like a human's nose. Elephants greet each other elephants with their trunks. Elephants live in the Savanna. They need water, food, and shade trees. They travel a lot.