Cities first appeared in the southern region of this land with the earliest dating back to about 3500 B. C.E. These were similar to small, independent countries. Each had their own
ruler, as well as their own farmland to provide food. Suppose that you were visiting one of
these early cities. You would see a walled settlement surrounded by farmland used to
supply food for the city, as well as strong city walls constructed with sunbaked bricks.
Moats, or ditches filled with water, would surround these walls and help keep out
enemies. During an attack, people living outside the city walls would flee inside for
protection.

what is An important idea in the paragraph above ?

After graduating from college with a degree in education, matt found a teaching jobin saudi arabia. he figured that a teaching job in the middle east would be the same as a teaching job in the united states. while there were similarities between american and saudi schools, matt was unprepared for the differences between the two cultures. on the first day, a number of his students arrived later than the class's designated 10 a. m. starting time. later, during a break, he noted that his students seemed to stand closely to each other and to him when they spoke. after class, a confused matt asked the american director of the teaching program about these observations. that's why it's always important to do your homework! the director responded with a laugh. what is the possible explanation that director could gave him?