Context: Figure: Serengeti National Park.
Serengeti National Park is a savanna grassland ecosystem in Tanzania, a country in eastern Africa. Many types of animals migrate through the park each year.
Which statement describes the Serengeti National Park ecosystem?
A. It has soil that is poor in nutrients.
B. It has soil that is rich in nutrients.
Select the correct answer from the provided options and reply with the letter associated with it.

A