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 cool summers and long, cold winters.
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

A