What are the physical characteristics of the sahel

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

The district of columbia could be eliminated completely if a majority of congress voted in favor of the action. a. true b. false

Which modern technology has not made a great difference in the inuit way of life?