Final answer:
Age-related transition points in social development describe the need for individuals to be socialized into new societal roles and expectations as they encounter certain life milestones such as starting school or retiring, with option (a) being the correct description among the choices given.
Step-by-step explanation:
The role of age-related transition points in social development involves the process of socialization into new roles as a person reaches certain ages. Option (a) correctly describes these transition points, which include milestones such as going to school, entering the workforce, and entering retirement. These points necessitate an adjustment and socialization to the expectations and responsibilities associated with the new life stage. Unlike the total institution scenario mentioned in option (b), age-related transitions do not inherently involve a loss of previous identity but instead add new facets to one's social roles. Meanwhile, option (c) more closely aligns with the concept of resocialization, which happens when an individual's previous behaviors are replaced to adjust to a new environment, like in the military or senior care. Therefore, only the description in option (a) accurately identifies the role of age-related transitions in the context of social development.