The continent of south america is dominated by:
a. the straits of magellan.
b. the amazon rain forest.
c. the brazilian coastline.
d. the isthmus of panama.

The continent of South America is dominated by B. the Amazon rain forest.
This forest, also known as Amazonia, or the Amazon Jungle, encompasses 7,000,000 square kilometers of space, which is a huge territory covered in rainforest. The other options are indeed located in South America, however, they are nowhere near as large as B. 

Answer mauritania is in the northwestern part of african, meaning its in the western hemisphere, and how do i know/ the map showed me so; ///: )

Answer meranesia;