I believe it is a landform.
If you're asking true or false, the answer is false.
Answer: the United States has diverse ecosystems consisting of differing biomes and climates. The western United States contains several different mountain chains, with the two main ones being the cascades/sierra nevada chain and the rocky mountains. The region between the two, which contain s states such as nevada and utah, have desert and valley like features. After the Rockies end near colorado, the midwest region is mostly consists of plain like features. The Appalachian mountains are towards the eastern region of the country. Mexico, similar to America, has diverse land feautures. Areas near the atlantic gulf resemble a biome similar to that of a rainforest plain region. The western portion of Mexico is deserty and mountainous, similar to that of the western United States.
:)
