Final answer:
Large blocks of land located in a rural area of a Midwestern state are most likely described by cluster zoning, which allows for concentrated development while preserving open and agricultural spaces.
Step-by-step explanation:
The described scenario of large blocks of land located in a rural area of a Midwestern state is most likely to be described by Cluster zoning. Cluster zoning is a type of zoning that allows for concentrated development in certain areas while preserving open and agricultural spaces in other areas. This type of zoning is often used in rural areas to balance the need for development and the preservation of agricultural land.