Final answer:
An 18-month-old pointing or vocalizing to get attention is a sign of social development.
Step-by-step explanation:
When an 18-month-old points or vocalizes to get your attention, this is a sign of social development. At this age, toddlers are starting to develop their social skills and understand how to interact with others. Pointing and vocalizing are early forms of communication and a way for them to express their needs and get the attention of others.