Coffee is an example of a

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

What is the name for the famous "ring" of volcanos? a. ring of flames b. ring of fire c. ring of lava d. ring of death

Which of the following is an important principle of how water moves through a watershed? a. most freshwater is in the form of ice. b. small streams flow into larger streams. c. each watershed contains only a single source of water. d. clouds are formed through evaporation and then condensation.