Which of the following statements is true of both ancient egypt and ancient sumer? a. barley and wheat were both civilizations' main crops. b. both civilizations were protected by the surrounding desert. c. neither civilization was protected by geographic barriers. d. neither civilization had predictable annual river flooding.

Match the following terms and definitions a region in arkansas defined by the arkansas river in the western part of the state answer 1 a thoroughly dissected area with steep valley walls and narrow floors answer 2 a geographical region of a country or state answer 3 the friendly and generous reception and entertainment of guests, visitors, or strangers answer 4 the branch of knowledge concerned with the production, consumption, and transfer of wealth answer 5 statistical data relating to the population and particular groups within it answer 6 a mountain range in west central arkansas and southeastern oklahoma answer 7 travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours answer 8 answer all parts of the question.

Select the natural regions. delta denver forest georgia north america plateau stream

The desert expands by hundreds of square miles each year.