How is each section of land defined in the government survey method?

In the government survey method, land is divided into townships and sections for the purpose of identifying and mapping land parcels. Each section is specifically defined as one square mile in area. Since one square mile is equivalent to 640 acres, the correct option accurately captures the definition of a section in this method of land surveying.

The concept of a section being one square mile helps in understanding how larger tracts of land are organized and subdivided for agricultural, residential, or commercial use, and it plays a crucial role in real estate transactions and land management.