Security and defense refer to the measures and strategies employed to protect a nation, organization, or individual from threats and harm. This includes military forces, intelligence agencies, and law enforcement, which work together to ensure safety and stability. Key components often involve surveillance, cybersecurity, and emergency response systems. In the context of international relations, security and defense also encompass alliances and treaties, such as NATO or the United Nations, which aim to promote peace and cooperation among countries. These frameworks help address conflicts and deter aggression, ensuring a collective approach to maintaining global security.