Final answer:
Social and psychological changes are the hallmarks of development in school-age children, adolescents, and aging adults.
Step-by-step explanation:
Social and psychological changes are the hallmarks of development in different stages of life, including school-age children, adolescents, and aging adults. School-age children may experience changes in self-esteem and body modesty, while adolescents undergo rapid cognitive development and changes in relationships. Aging adults confront psychological issues associated with entering the last phase of life. These changes are influenced by biological, social, and cultural factors.