How did geography of the world influence the advantages of different groups?

Which barrier to economic development is shown in the following examples?

Which is not a cash crop grown in the high islands of melanesia and polynesia? d. rubber c. coffee b. sugar cane a. kiwifruit

This image shows a volcanic eruption in hawaii with lava flowing into the sea. which statements best describe this eruption? check all that apply. its magma is high in silica. its magma has low viscosity. its lava came from a quiet eruption. its lava sets fire to everything in its path. its lava came from an explosive eruption.