Think back to the "pleasurable outcome question at the beginning of this chapter. You should now realize that that question was really asking about reinforcement. What type of reinforcement worked best for you when you were in grade school? Positive or negative? Did this change in high school?

Danilo has been working for metropolitan taxi for three months. he expected that his job would be to drive around the city, pick up fares, and drop them off at their desired locations, but in his first few days on the job he realized that the job entails much more. he must keep his taxi cab clean and neat, and some days he will be stationed at the shop and go to people's houses to pick them up and bring them to the local airport. within a few months, he has learned that taxi drivers often express frustration with the people they call "civilians"—that is, non–taxi drivers, whose driving skills they complain about incessantly. in his first few months on the job, describes what danilo is undergoing.

How did ancient civilizations develope its agriculture and protect its population

Why would someone who is studying the history or culture of this time. find this text interesting important or useful?