A specific time during development when a particular event has its greatest consequences, and the presence of certain kinds of environmental stimuli is necessary for development to proceed normally is referred to as critical period.
Explanation:
A step in the process in which the nervous system is particularly sensitive to environmental stimuli is understood as a critical period. If the life form does not obtain the suitable stimuli necessary to develop a given mechanism during this period, it may be challenging, or even unfeasible, to develop that component later on in life. For an instance the prime time of learning is learning how to crawl and walk, another is communicating and how to communicate properly with others.
