John has inherited a personality trait that makes him more likely to keep to himself than to socialize. As a result, he does not have many friends and spends a lot of time alone. If John were to develop depression, the model that would probably best explain this situation and the cause of his depression is:.1. Diathesis-stress2. Biological3. Interpersonal4. Reciprocal gene environment

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography. 

Ithink its called a "dynamic situation"