The major benefit of the Greater Yellowstone Ecosystem Management Plan is Select one: a. the creation of large regions of wilderness for animals such as bison and grizzly. b. the increase of cattle grazing on park land. c. the increase of mining and old-growth logging on park land. d. None of these are correct.

The correct answer is A. The creation of large regions of wilderness for animals such as bison and grizzly.

Explanation:

Greater Yellowstone Ecosystem located within the Rocky Mountains in the U. S. is one of few ecosystems around the world that remain intact. This ecosystem is the habitat of many native species of both plants and animals. In terms of management plans for the ecosystem, during the years plans have focused on environmental sustainability and preservation of natural conditions; this includes defining areas or regions of wilderness including forests, meadows, and grassland, promoting policies to protect species of the area, limiting human intervention, among others.

From these, one of the major benefits is the creation or establishment of areas of wilderness because this plays an important role in the preservation of species including grizzly bears, elks, wolves, and bison. Thus, the major benefit from the options is "The creation of large regions of wilderness for animals such as bison and grizzly".