How does the sahara desert act like a barrier

Which area on the map would be most likely to have the most oil exploration in since the start of the 21st century? a) b) c) d) plz me

From the standpoint of geography,a is an internal rendering of an individual's known world

Which of the following mountain ranges is home to the largest mountain peak in europe? a. the carpathian mountains b. the caucasus mountains c. the balkan mountains d. the ural mountains select the best answer from the choices provided a b c d