Final answer:
The Delta-Yazoo Basin became more successful in agriculture in the 1880s due to advancements in farm technology, the expansion of the railroad network, and the availability of land through the Homestead Act.
Step-by-step explanation:
The Delta-Yazoo Basin became a more successful agricultural region beginning in the 1880s due to several factors. Firstly, advancements in farm technology, such as improved plows and machinery, increased overall production and productivity per acre. Secondly, the expansion of the railroad network brought much-needed supplies to the region. Lastly, the availability of land and the government's Homestead Act of 1862 allowed for the settlement of farmers in the region.