Even sketchier is information on what types of organization are acquired first, but anecdotal information and research  suggests that even young children understand chronological information, making narratives the easiest type of student writing. Persuasive writing usually requires logical thinking and studies in child development indicate that logical thinking is not present until a child is 10–12 years old, making it one of the later writing skills to acquire. Before this age, persuasive writing will rely mostly on emotional arguments.
I would argue however, that the most important aspect to consider is relevance to your audience. I appreciate that speakers communicate better on topics that they really care about, but even an enthusastic speaker wouldn’t be able to hold an audience’s attention on irrelevant content.
Of course, presentations should ideally satisfy all three criteria – but in practice, I’m sure that these defining lines aren’t quite so clear. In this case, I’d suggest that it’s more important to focus on producing content that will keep the audience riveted, rather than something that would keep you rivited – and lack of specific knowledge of a topic just calls for more research!