Which of the following actions constitutes interference with an investigation?

Interference with an investigation occurs when actions prevent law enforcement or social services from gathering necessary information or interacting with a subject involved in the investigation. Refusing to disclose the whereabouts of the juvenile directly hinders investigators' ability to locate the individual for questioning or assessment, which is essential for progressing in the investigation.

In contrast, providing a location for the juvenile or allowing access for interviews can facilitate the investigation by enabling investigators to speak with the juvenile and gather important information. Disclosing educational needs also does not obstruct an investigation; rather, it can be pertinent information that supports understanding the juvenile's circumstances and assists in the investigation process. Therefore, the action that directly prevents law enforcement or social services from doing their job is the refusal to disclose the juvenile’s whereabouts.