The "research" part of this assignment:
The PowerPoint presentation should provide a detailed overview of one of the topics listed in Appendix F of the syllabus that you have been assigned...The presentation should help provide parents, other professionals, and/or individuals with autism with current information on the topic. Students should incorporate current research into the presentation."
Clearly, you'll need to do research to find current information on your topic.
Since you need to provide a detailed overview of your topic, you're likely to want to consult more than one database to be sure you're finding good, current research. Also, depending on your topic, you may really need to look outside of the field of psychology.
The standard reminders apply: