Final answer:
Captions are the best formatting technique among the options given for making specific information easy to find on a page, as they directly annotate and explain the accompanying visuals.
Step-by-step explanation:
Among the choices given, the best formatting technique to make finding specific information on a page easy is the use of captions. Captions provide a brief explanation or annotation of the accompanying images, such as diagrams, photos, or charts, making it easier for readers to understand and locate information related to those visuals. On the other hand, diagrams can effectively represent information visually, but without captions, they may not be self-explanatory. Background colors can highlight or differentiate sections, but they may not directly assist in locating specific information. White space improves overall readability and reduces clutter, which helps in preventing information overload, but it does not directly lead the reader to specific information.
Using captions is akin to employing signposts that guide readers through a page by providing context and meaning to visual representations. Thus, a captioned image or graphic becomes a more effective tool for locating and understanding complex or detailed information quickly.