Which agency developed the study guide for coal miners seeking certification?

The Virginia Department of Energy is the correct choice as it is responsible for overseeing energy resources, including coal mining, in Virginia. This agency plays a crucial role in developing the educational materials and resources necessary for coal miners seeking certification. The study guide is designed to help miners understand safety procedures, regulations, and practices essential for operating in the coal mining industry safely and effectively.

The other agencies listed—while they have relevant functions—do not specifically focus on creating study guides for miner certification. The Virginia Department of Natural Resources primarily deals with the protection and management of natural resources, but not directly with miner education. The Virginia Coal Association represents industry stakeholders but does not directly produce educational materials. The Coal Mine Safety Administration, although connected to mining safety and regulations, does not have a specific role in developing study guides for miners in Virginia. Therefore, the Virginia Department of Energy is the agency that focuses specifically on the education and certification of coal miners through relevant resources.