How did the crusades affect Europe and Middle Eastern relations

Suggest two reasons why irrigation is important for human development of the desert

Physical features of central america look at the map above which of the following is true

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory