Final answer:
Each square mile (section) in a township contains 640 acres.The correct option is D.
Step-by-step explanation:
The student asked how many acres are in each square mile (section) in a township. In the system of townships and sections used for land division, each township is a square parcel of land six miles wide, and is divided into 36 one-square-mile parcels called sections. Each of these square mile sections is equivalent to 640 acres of land.