E. functional region, because it is a research and development center
Explanation:
The Chicago metropolitan region is home to large corporate headquarters and a large number of technology firms and it covers 14 counties and 9.83 million population. Has 6 million full and part-time employees, 400 major corporate headquarters. Alos is home to a large number of national universities.
The correct option is LOESS. Loess refers to a compacted yellowish deposit of wind blown sediments which is usually found extensively in the mid latitudes. Loess is formed by the accumulation of dust that had been blown by the wind. Scientists believed that about 10% of the earth's land area is covered by loess.<span />