Complete a frase das letras ( a ) ( b ) ( c )

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 of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

The amazon river is in africa true or false