Final answer:
The question matches life stages with behaviors, associating infants with vocalizations, preschoolers with role-play, school-age children with social comparisons, and adolescents with seeking independence.
Step-by-step explanation:
The question requires matching actions to the corresponding stages of life. Infants would be best matched with "vocalizing sounds and performing body movements" as they begin to coo, babble, and start uttering their first words around 12 months old. Preschoolers often engage in "acting out 'grownup' behavior," like playing dress-up or talking on a toy telephone, demonstrating their burgeoning self-concept and capacity for role-playing.
School-age children sometimes express "having conflicting opinions with peers" as they compare themselves to others and develop their sense of competence. Finally, adolescents are known for "distancing themselves from parents" as they continue to establish their independence and navigate the challenges of teen identity.