The correct answer is (d). Yellowstone National Park is located in the western United States, mostly in the state of Wyoming, but also in Montana and Idaho. It is the oldest national park in the United States, having been established in 1872. The park is known for its geysers, hot springs, mudpots, and fumaroles, which are all geothermal features caused by the underlying Yellowstone Caldera, a volcanic hotspot. Yellowstone is also home to a variety of wildlife, including bison, elk, bears, wolves, and pronghorns.
Option (a), Brazil, is incorrect because Yellowstone National Park is not located in Brazil. Brazil is a country in South America.
Option (b), Canada, is incorrect because Yellowstone National Park is not located in Canada. Canada is a country in North America.
Option (c), South Africa, is incorrect because Yellowstone National Park is not located in South Africa. South Africa is a country in Africa.