Question

How was Yellowstone formed?

Answer 1

Yellowstone had many natural resources that needed to be preserved in order to protect the land the U.S. made it a national park

Answer 2

Millions of years ago, a hot spot formed in the Earth’s mantle  Roughly 600,000 years ago, the hot spot pushed a large plume of magma toward the Earth’s surface. This caused the crust to jut upward. Which created Yellow Stone

(Remember this is my knowledge not a highly trained computers ;P )