Why does the amount of water that flows in a river vary from year?

What is most likely to cause someone to fall overboard?

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

Using complete sentences, outline two specific examples of how technology advances make the world seem smaller. explain what it means to say the world is “shrinking”