What is the most critical earliest social milestone?

Question

Quizplus · Accepted Answer

The social smile is considered the most critical early social milestone because it indicates a baby's ability to recognize and respond to social cues, as well as their interest in social interaction. Bonding with a caregiver, lack of excessive crying or colic, and focusing on sights and sounds are also important early developmental milestones, but they are not specifically markers of social development.

What Is the Most Critical Earliest Social Milestone