What does the term "martial" suggest?

The term "martial" is derived from the Latin word "martialis," which pertains to Mars, the Roman god of war. As such, it is most frequently used to describe anything that is related to war or military life. This includes concepts such as martial arts (combat skills) and martial law (law implemented by military authority). The connotation of "martial" strongly emphasizes conflict, combat readiness, and military discipline, making it inherently connected to the notion of war.

Understanding this context clarifies why it is the best choice among the options presented. The other options, while they address different themes, do not capture the essential meaning of "martial." For instance, “peaceful and calm” directly contradicts the notion of war; “related to law and order” can sometimes imply military authority but lacks the specific reference to war; and “focused on cooperation” represents ideals that are typically at odds with the competitive and often adversarial nature associated with martial concepts.