For both the Short Writing Assignment #3 and Major Essay #2, you need to choose a, "...topic that is debatable or that invites more than one perspective...".
Choosing a topic can be the hardest part of the research process. Make sure you give yourself enough time to think about ideas you have for a topic and then do some preliminary searching to get a feel for what is available. Watch this video for a good example on how searching can help you move from a general idea to a more refined research topic.
Your assignments:
Research is more than just searching for an answer and reporting that answer. For this kind of project, it's an iterative process of asking questions, understanding how others have approached similar questions, and eventually drawing your own conclusions on what you believe the answer to be. If this feels overwhelming, don't be afraid to ask for help at any point during the process!