Which environmental problems occur as a result of slash-and-burn-agriculture?

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

Landmasses on a flat map look distorted because

Which of these has the least impact on the climate of a place