Which of the following is necessary for electricity to flow through an electric circuit?
A. The wires must be insulated.
B. The path of the electricity must be complete.
C. At least two batteries must be used.
D. A switch must be used to allow the flow.

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas