The correct answer is Granges.
The term that refers to farmers who met for lectures, sewing bees, and other events is Granges.
Granger is a term used in the United States by the 1800s to identify the farmers. It is out of use nowadays. In 1886, the Grangers started a movement when farmers from the Middle West united against the monopoly of grains transportation. Grangers were also farmers who met for lectures, sewing bees, and other events.
