The process of imprinting occurs during a brief developmental phase known as

A critical period

Explanation:

In the development phase, a critical period is the short time period which occur when the imprinting taking place. A critical period basically relates to the development and ability of one's language.

Critical period represent to the development in the psychology. In the critical period, imprinting is the process that is basically used to describe different types of the stages in the development process.

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