In a search operation, which activity represents a proactive approach in the investigation phase?

Following up leads immediately is an example of a proactive approach in the investigation phase of a search operation because it involves taking swift action to explore information that may assist in locating the subject. Proactivity in this context means actively engaging with available data and evidence, rather than remaining passive or reactive.

By pursuing leads as soon as they are identified, searchers can potentially uncover critical information that could lead to the swift resolution of the case. This approach can help maintain momentum in the investigation and may yield time-sensitive results that are vital to the outcome of the search operation.

In contrast, gathering only paper evidence can result in a static approach where investigators may miss valuable insights. Waiting for the subject to return represents inaction and relies heavily on luck rather than investigative diligence. Utilizing only technology-based methods may limit the investigation's scope and prevent investigators from fully leveraging all evidence sources available. Therefore, taking immediate action by following up on leads exemplifies a comprehensive and proactive strategy in conducting investigations efficiently.