Which type of soil is required for growing cotton

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

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

Formidable obstacles of climate, terrain, and distance hinder exploitation of natural resources in russia. true false