Read this excerpt from "The World on Turtle's Back."

"Without knowing it, the right and left-handed twins built balance into the world. The plant-eating animals created by the right-handed twin balanced out the meat-eating animals created by the left-handed twin. And so the world thrived, and this was good."

Which statement best describes the purpose of this excerpt?

A. to describe who created plant- and meat-eating animals
B. to explain that some animals are good and others are evil
C. to explain how balance came to exist in the natural world
D. to describe two different kinds of animals found in the world