volunteer

The babies are taken care of by volunteers.

During the holidays, some university students go to Africa as volunteers and help to perfect local wildlife conservation.

It drew strength from the not-so-young people who braved the bitter cold and scorching heat to knock on doors of perfect strangers, and from the millions of Americans who volunteered and organized and proved that more than two centuries later a government of the people, by the people, and for the people has not perished from the Earth.