I’m stuck on a English question and need an explanation.

write your own myth centered on the theme of katabasis (κατάβασις, from κατὰ “down” and βαίνω “go”). So your own form of ‘descent’ – it can be a trip to the underworld, but ‘descent’ takes many forms- I would like you to run free with this concept. If you want to write your myth in verse, go ahead. If you create your myth purely through visuals, go for it! In the end, this is about fun, and applying what you’ve learned about myths when you create your own. After you post your myth, reply to one of your peers myths- explain why and how their myth functions as a myth.