What is the central idea of this article? A The central idea is that armadillos are native to central and South America. B The central idea is that armadillos have characteristics that allow them the ability to protect themselves from all types of prey. C The central idea is that armadillos are the only mammals with protective shells d The central idea is that armadillos have many characteristics that make them unique and able to survive in their habitats

C. The central idea is that armadillos are the only mammals with protective shells.

Explanation:

The National Geographic article "Armadillos" describes how armadillos are one type of mammal that has a feature that makes them unique from others. It details some specific facts about these mammals found mostly in Latin America.

With all specifics about the armadillo, the main or central idea of the article seems to be that they are the only mammals that have protective shells. These sloth-like mammal's shells, bony plates enable them to be secure from any danger.

Thus, the correct answer is option C.

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