Final answer:
It is true that identifying the topic and main headings or categories is necessary to create visual mappings.
Step-by-step explanation:
True: To create visual mappings such as graphic organizers or concept maps, you must first identify the topic and then determine the main headings or categories that represent the key areas of information related to that topic. This process is crucial in organizing thoughts and structuring the information to support your arguments, thesis, or main ideas in a report or essay. While in some cases, available sources may provide only limited information, leading to a less dense visual representation, the essential element is the identification of how resources relate to the main argument or thesis.