Context: Figure: Yasuni National Park.
The Amazon rain forest in South America is the largest rain forest ecosystem in the world. Ecuador's Yasuni National Park, which is in the Amazon rain forest, has many different species of plants, birds, and mammals.
Which statement describes the Yasuni National Park ecosystem?
A. It has only a few types of organisms.
B. It has many different types of organisms.
C. It has soil that is rich in nutrients.
Determine the correct option from the provided choices and reply with its corresponding letter.

B