The term "foster children" refers to young people who have been placed in the care of a foster family by the government or social services. These children are often removed from their biological families due to abuse, neglect, or other safety concerns and need a safe and nurturing environment while their parents work on improving their circumstances. Foster families provide temporary homes for these children, offering them love, support, and stability until they can return home or be placed in a more permanent situation such as adoption.