These bison are part of a herd that lives on the largest grass prairie in the US. What national park do they call home?

These bison are part of a herd that lives on the largest grass prairie in the US. What national park do they call home?

A Badlands
B Wind Cave
C Yellowstone

Wind Cave National Park in South Dakota is famous both for its extensive, underground cave system and, above it, a vast prairie, which is home to one of only four free-roaming bison herds in North America.

The correct answer is Wind Cave.