During which developmental era of the proprium would a child develop a sense of possession?

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The developmental era of self-extension is where a child begins to develop a sense of possession, as they start to see themselves as having an impact on the world around them and begin to identify objects as "mine". This era typically occurs between the ages of 2 and 3 years old. Self-esteem (A) involves the child's overall evaluation of themselves, self-identity (B) is the understanding of oneself as a unique individual, and self-image (D) refers to the mental picture one has of themselves, including physical appearance and personality traits. While all of these may be related to a sense of possession in some way, they are not directly associated with its development.

During Which Developmental Era of the Proprium Would a Child