This assignment can involve as much creativity, or as little, as you want. And you are welcome to submit it in any format that you can upload as long as your point is clear. Draw it on and take a photo. Make a chart in Microsoft Word. Make a Jamboard and share the link. Create an elaborate infographic. Whatever you prefer.
Construct a relationship tree/chart and demonstrate the relationship between the disciplines that you have focused on or intend to focus on as part of your Interdisciplinary Studies degree. How are they related? How do they connect together? What larger areas are they part of?
If this sounds difficult, you are overthinking it!