If you subscribe to this school of psychology, you believe that psychology is the study of only what is observable and measurable. this historical and modern perspective is better known as

 The correct answer is :  behaviorism

Explanation:  The behavioral process is one of the three key terms that make up the definition of psychology. You cannot understand human behavior without also understanding the influence of culture on human diversity. Behavioral genetics focuses on the extent to which heredity accounts for individual differences in behavior and thinking.

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

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