Answer the question based on the text!

    Elephants are the largest land animals on earth. They have the largest brains of any mammals. Elephants talk to each other. Researchers have discovered more than 50 different types of calls that they use to communicate with each other. Their trunks are strong enough to pick up trees but sensitive enough to pick up flowers. They use them as tools to sweep paths, to scratch themselves and to swat flies. They are good swimmers and use their trunks like snorkles. They live together in family groups. They help each other when in trouble. They join together to care for and rescue their young.

"... to care for and rescue their ...."

The closest synonym of the word 'rescue' is ....