Alittle boy is allowed to play with a laboratory rat and shows no fear of it. then, a scientist makes a scary noise by banging an iron bar whenever the little boy reaches for the rat. soon, the boy begins crying whenever the rat comes near him. in this study, the scary noise is the

The scary noise in the scenario in which a little boy is allowed to play with a laboratory rat and shows no fear of it. then,and  a scientist makes a scary noise by banging an iron bar whenever the little boy reaches for the rat and because of this the boy begins crying whenever the rat comes near him is  unconditioned stimulus.
 Unconditioned stimulus is a stimulus that naturally, and automatically triggers a response. In this case such stimulus is the noise.

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.