For each principle in part A, select a migration stream identified by letter on the map above, and discuss how the stream you choose illustrates the principle. Note: Each lettered migration stream may be used only once.

Which of the following characterize the historical move toward urbanization? i. increase in pollution ii. increase in frequency of natural disasters iii. increase in incidence of infectious disease a. i b. ii c. i and ii d. i and iii e. i, ii and iii

Ahigh school teacher wants to study the seating habits of students in the cafeteria to determine if students sit in the same seats or change seats from day to day. she sits in the cafeteria for several days, and without interacting with the students, records where they sit each day. what is a potential benefit of this type of research? there is an independent variable. there is a dependent variable. the researcher can gain personal information about an individual. the participants act normally. the information can be gathered over a period of several years.

Fourth-graders richard and bruce sat on the stoop outside the school. they had missed their bus and now had to make the decision whether to walk taking a shortcut or just wait until their mothers noticed they had not arrived home