"Lines of intelligence" refer to the various channels or methods through which information is gathered, analyzed, and disseminated. These lines can include human intelligence (HUMINT), signals intelligence (SIGINT), and imagery intelligence (IMINT), among others. Each type focuses on different sources, such as people, communications, or visual data, to provide insights for decision-making. In the context of national security, intelligence agencies utilize these lines to assess threats and inform policy. By integrating information from multiple lines, agencies can create a comprehensive understanding of situations, aiding in strategic planning and operational effectiveness.