Define "open source intelligence."

Open source intelligence refers specifically to the practice of collecting and analyzing information that is publicly available. This can include data from a wide range of sources such as newspapers, websites, social media platforms, public records, and other accessible media. The essence of open source intelligence is that it leverages readily available resources to gather insights, thereby making it distinct from intelligence that relies on confidential or proprietary sources.

Using public information is crucial for many organizations, including those involved in compliance and risk management, as it enables them to assess threats, maintain knowledge of market trends, and stay informed without breaching legal or ethical boundaries. Such information can be critical for detecting money laundering activities, understanding customer behaviors, or monitoring regulatory changes.

The other options involve using sources that are not publicly accessible, such as confidential internal data, proprietary analysis tools, or surveillance data, which do not align with the definition of open source intelligence. Hence, the emphasis on collecting information from public sources clearly identifies this correct option.