What has caused the sahel to expand in recent years?

Temperatures below 32 degrees fahrenheit are considered to be below

In the kingdom of saudi arabia the government controls every aspect of oil production which makes up the majority of the country's economy. while other businesses are owned by individuals, the biggest segment of saudi arabia's economy is oil production. saudi arabia's economy would best be described as a) entirely market. b) almost entirely command. c) a mixture between just market and traditional. d) a mixed economy with large amounts of command.

Which factors are examples of how technology may have affected the great migration apex