Vocabulary:
The jobless (people): unemployed people.
The elderly (people): old people considered as a group.
The adolescents: young people who are developing into adults.
The sick (people) (UK:ill): people who are ill.
The homeless (people): people who do not have a home, usually because they are poor.
The disabled (people): disabled people as a group. This term is now considered offensive, and people usually prefer to say people with disabilities or disabled people.
The poor (people): poor people considered together as a group.
The children: boys or girls from the time of birth until they are adults, or sons or daughters of any age.
The addicted (people): people who are unable to stop taking drugs, or doing something as a habit.
The refugees: people who leave their homes or countries to find safety, esp. during a war or for political or religious reasons.
The orphans (orphan: a child whose parents are dead): children whose parents are dead.