Match the time period in column 1 with the correct population description in column 2

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

If a population is growing quickly in a small area then what must increase as well

How does the bare soil surface type affect the amount of runoff