Bert is standing in a shopping mall when he begins having difficulty breathing. he feels his heart pounding, feels weak and dizzy, and notices that he is perspiring heavily. he feels like he might be having a heart attack. at the very least, he senses he is losing control and is afraid that if he's not having a heart attack, he is going "crazy." assuming that bert is not having an actual heart attack, he is most likely suffering from

Sandra lives in the heart of a large city. lately, there have been robberies on several of the streets near where sandra lives but none on her street. sandra and her neighbors believe that they have not seen any crime on their street because they know each other, notice when strangers or strange cars are in the neighborhood, and have a mix of old retired couples and young families who use the neighborhood at different times of the day. jane jacobs would see this as an example of: