Final answer:
The source of the Amazon River is close to the Andes Mountains, which is the correct answer (option B). The Andes are the longest mountain range on Earth, located along the western edge of South America. The Amazon is a vast river system originating from the Peruvian Andes.
Step-by-step explanation:
The source of the Amazon River can be found close to the Andes Mountains, making option B the correct answer. This mountain range extends along the entire western region of South America and is notable for its high peaks and active volcanoes. The Amazon River itself is a vast water system that has its origins in the Peruvian Andes, around 150 miles from the Pacific Ocean. This immense river system includes numerous tributaries and spans across the Amazon Basin, which covers 40 percent of South America.