Texes Social Studies Content Practice Exam

In which region of the United States would you find the most diverse ecosystems?

1. A) Northeast

2. B) Southeast

3. C) Southwest

4. D) Northwest

The correct answer is: D) Northwest

The Northwest region of the United States is characterized by its varied geography and climate, which contribute to a rich diversity of ecosystems. This area includes coastal rainforests, mountain ranges, and temperate forests, each supporting unique communities of flora and fauna. The Pacific Northwest, in particular, is known for its significant biodiversity, including species not found in other parts of the country. In comparison, while the other regions also have diverse ecosystems, they generally do not match the high level of ecological variety found in the Northwest. The Northeast features mixed forests and has seasonal variations, but it is more uniform in its ecosystem types. The Southeast is known for its wetlands and subtropical environments but lacks the broad ecological range present in the Northwest. The Southwest, with its arid desert environments and some mountainous areas, has distinct ecosystems, but again, it does not exhibit the same diversity as the Northwest. Thus, the Northwest stands out as the region with the most diverse ecosystems in the United States.