Which large mammal, now found in small numbers in preserves, was driven to near extinction in Arkansas?

The American Bison is the correct answer because this species once roamed Arkansas in great numbers before being nearly driven to extinction due to overhunting and habitat loss in the 19th century. Conservation efforts have allowed for a small population to exist in preserves today, reflecting a successful recovery initiative for this iconic large mammal.

The other species mentioned do not share the same historical context or conservation trajectory within Arkansas. Elk populations have fluctuated but have not experienced the same level of near extinction in the state. The mountain goat and plains zebra are not native to Arkansas and therefore do not have a history of being driven to near extinction within the state's boundaries.