Final answer:
The Defense Logistics Agency is responsible for comprehensive energy support for the Department of Defense, facilitating logistical, acquisition, and technical services for the military branches.
Step-by-step explanation:
The comprehensive energy support for the Department of Defense (DOD) is the responsibility of the Defense Logistics Agency (DLA). The DLA is a combat support agency under the Department of Defense that provides logistics, acquisition, and technical services to the army, navy, air force, marine corps, federal agencies, and partner and allied nations. This agency is crucial for the U.S. military to maintain operational readiness and to effectively project power across the globe, fulfilling the initiatives set forth by the National Security Act of 1947 which aimed to streamline U.S. military organization and strengthen its capabilities.