Which emotional development milestone is reached around the age of 2?

The development of self-concept is a significant emotional milestone that typically emerges around the age of 2. At this age, children begin to recognize themselves as separate individuals from others. They start to express their preferences, assert their independence, and demonstrate a sense of identity, often using pronouns such as "I" or "mine." This developing self-concept is crucial for emotional growth, as it lays the foundation for self-awareness and how they relate to the world around them.

While the other options highlight important developmental skills, they do not specifically capture this milestone in emotional development. Carrying on simple conversations indicates language development; understanding and obeying commands pertain more to cognitive and compliance aspects; and sharing with other children relates to social skills, which generally develop later as children learn to navigate social interactions. The unique emergence of self-concept at this stage marks a pivotal step in a child's emotional development.