Developmental tasks refer to physical or cognitive skills that must be accomplished during different age periods. For infants, walking is a key task, while toddlers work on autonomy. Young adults focus on relationships, careers, and independence. Middle adulthood involves maintaining health, relationships with family including children and parents, and community involvement. Older adults adjust to physical and social changes like retirement and loss of a spouse while finding meaning in life. Rehabilitation aims to restore ability and maximize independence through medical, social, psychological, and vocational support from multidisciplinary teams.