Which of the following forests is located in Northwestern Nebraska?

The Nebraska National Forest is located in Northwestern Nebraska, making it the correct choice. This area is significant for its unique ecosystems and serves as one of the largest hand-planted forests in the United States. The Nebraska National Forest offers a variety of habitats and recreational opportunities, contributing to the conservation of wildlife and forest resources in the region.

While the Ponderosa Pine forest is indeed present in the area, it is more specific to the types of trees found within that ecosystem rather than the designation of the national forest itself. The Wildcat Hills is a significant geographical feature in the same vicinity, but it does not refer to an entire forest system like the Nebraska National Forest. Fontenelle Forest is located much further southeast near Omaha and is not part of Northwestern Nebraska's natural landscape. Each of these other options has its distinct features, but they do not represent the extensive area and designation of the Nebraska National Forest in Northwestern Nebraska.