Another challenge , @Jeff_F, is that Canvas Likes work only with replies, not with original posts.
Anyway, the issue really is how do you disaggregate one piece of text? In the context, the answer is, you can't. Even the vaunted Padlet won't help you there, @EmmanuelKoku. What you are saying is the student should input in a single text block two questions, and people should be able to separately like them. Not happening. Think about how you would do this in Padlet - you would ask students to make 2 separate posts for the two questions. And then they can be separately liked. So, do the same in Canvas discussions.
And you can ask them to like their top 3 - and then you'll have to count which ones have the most likes - Canvas doesn't let you sort replies by likes.