Final answer:
Infants undergo essential self-awareness development marked by mirror self-recognition around 18 months and subsequent understanding of gender and emotions as they grow.
Explanation:
Infants go through significant developments in self-awareness during their first few years of life. Initially lacking self-concept, infants begin recognizing themselves in the mirror around 18 months of age, a key aspect of self-awareness demonstrated through experiments like the mirror test. As they grow, children become aware of their gender around two years and develop self-descriptions based on physical features and emotions as they approach age six.
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