What is the correct definition of military laws?

laws that the military enacts and enforces when it takes control of a region during a conflict

laws that apply to those serving in the armed forces and to civilians who work for the armed forces

laws that govern a state or the nation as a whole in times of war or military crises

laws that are modeled after military regulations and that apply to local, state, and federal law enforcement agents

laws that apply to those serving in the armed forces and to civilians who work for the armed forces

Explanation:

Military law is a body of law that is concerned about maintaining the discipline of a nation's armed forces. This also applies to civilians who'd like to work for the armed forces and this is called the "Army Civilian Forces." It also encompasses citizen-soldiers who are working in both careers (military and non-military). They are called "military reserve forces." They undergo training in congruence to the laws made for the military.

Military law has to be differentiated from "martial law." Martial law is the body of law that is used in order to govern a state or nation in times of war or emergency.

Thus, this explains the answer.