Final answer:
National security depends on a strong economy, education, infrastructure, and diplomacy in addition to a strong military.
Step-by-step explanation:
National security depends on a strong economy, education, infrastructure, and diplomacy. In addition to a strong military, these factors contribute to a nation's overall security. For example, a strong economy provides resources for defense and national security measures, while education helps build a knowledgeable and skilled population to address security challenges. Infrastructure ensures the smooth functioning of essential services, such as power, communications, transportation, and water, which are vital for national security. Finally, diplomacy helps establish alliances, negotiate agreements, and resolve conflicts peacefully, enhancing a nation's security.