How did rich mineral deposits affect the growth of western African civilizations?

Which of the following describes what rocks usually are composed of ,

Which of the following events did not occur as a result of china’s open-door policy? a. trade between japan and china was encouraged. b. all countries were given equal access to chinese ports. c. foreign influence in china increased. d. the influence of the communist party weakened.

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky