In psychology, the critical period can be defined as the period in which some sort of transformation takes place in a limited time. <u>The critical period is that phase of life which is </u><u>important for the development</u><u> of certain skills psychologically. This period is also necessary for the development of an organism so that it can progress in a normal manner.</u>
It is the period during which the sensitivity of the nervous system is high. The critical period is also known as the optimal or the sensitive period.
Before the California Gold Rush there was the southern gold rush, the first in U.S. history, reached Georgia with the discovery of the Dahlonega Gold Belt in 1829.
Segment margin is the amount of net profit or net loss raised by a part of a business. It is useful to trace segment margins (especially on a trend line) in order to learn which parts of a business is do well or otherwise.
