Question

1. what is the name of the vast flatland area that stretches across the central united states, known for its agricultural productivity?

great plains
mississippi valley
mojave desert
none of the above
clear all

Explanation:

The Great Plains is a vast flatland region in central US known for agricultural productivity. Mojave Desert is arid, Mississippi Valley is a river valley (not primarily flatland for agriculture like the Great Plains), and "None of the above" is incorrect.

Answer:

A. Great Plains