Once you've chosen a topic and explored that topic through various sources, the next step is to develop your inquiry research question. This is a critical part of inquiry-based research and is an open-ended question that hasn't been answered before.
The Draft an Inquiry Question video (2:35 minutes) provides some strategies for creating an inquiry research question.
Talk with your professor to determine if the inqury research question is appropriate given the scope and scale of the assignment
Make sure you go through the research question approval process if required by your professor