What are the references that you need to know when you are searching the place where the amozon river and amazon rainforest would meet?

Witch of the following types of boundaries is most likely to result in a subduction zone

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.

Why did the first fleet take the shorter route along the entire west coast of africa?