Assimilation (incorporating new information into existing knowledge) the initial development of formal-operational thought, and these thinkers perceive the world subjectively and idealistically.

Adolescent

Explanation:

An adolescent is who think abstract and idealistically. This is the stage where adolescents start to think more logically. The trial and error method is used to solve the problem by children.

But on the other hand, the adolescent starts to think in a manner as scientist think. Adolescent solves the problem of systematically testing device.

Adolescent uses a systematical process to solve the problem which is called a hypothetical deductive method in which they find out the problem and solve it step by step and reduce the obstacle and conclude the solution.

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answer; validity;