What question would a scientist be most likely to use a model to answer?

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

5. what is a red giant? can our sun become a red giant? why or why not?

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade