"Rough-and-tumble play has been associated with the development of the area of the brain since it helps children to regulate their emotions, practice social skills, and strengthen their bodies."

Prefrontal cortex

Explanation:

Prefrontal cortex is found in he cerebral cortex that covers the frontal lobe. It is responsible for the planning, behavior, expression, decision making and most event that relates to the mind. It's basic activity is coordinating thoughts and actions with how they are planned in the mind or the will of an individual. Rough-and-tumble play has been associated with the development of the prefrontal cortex, because the prefrontal cortex is responsible for most activities of the mind.

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jefferson hoped to establish trade with the native american people of the west and find a water route to the pacific. jefferson also was fascinated by the prospect of what could be learned about the geography of the west, the lives and languages of the native americans, the plants and animals, the soil, the rocks, the weather, and how they differed from those in the east.

answer; i believe the correct answer is (crops);