When preparing a presentation involving external graphics or charts, it is crucial to provide proper attribution to maintain credibility and adhere to ethical standards. Given the specific context provided of Khaled's presentation on climate change that includes statistics on the increase of drought conditions in the United States, the piece of information that must be included with the graphic to ensure proper attribution is:
its publisher and date of publication
This ensures that the audience can verify the source of the data and know that the information is reliable and up-to-date. Including this information helps build trust in the accuracy of the presented data and maintains the integrity of the presentation.