This would be a area of Psych devoted to investigating the nature, orgin and consequences. Thus the main themes would be observations and correlation methods. Based period individual differences in behavior and such.
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Answer:
A Mountainous terrain
Explanation:
It's simiple the reason the pop density is so low is it is further away from the rest of the civalization. So if a family needs suplies they don't want to travel so far, so they live near shops and other people.
The manifest destiny was the belief that the U.S. had the rights to have all the land from the pacific ocean to the atlantic ocean.
Answer:
dual diagnosis
Explanation:
An individual with the condition of dual diagnosis has both a psychiatric illness and a substance use problem. About half of the people who suffer from psychiatric disorders will also have drug use problems at some time in their life. The interactions between the two conditions could severely affect both. When an individual is suffering from a substance abuse problems and mental disorder, the two issues sometimes interfere with one another and develop a vicious cycle of dependence.