What is the approximate longitude of Tehran?

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

Which season has the least amount of rain in the northern latitudes

The process by which liquid water changes into water vapour is called what ?