How to response to the editor for a minor suggestion given by the reviewer via a formal letter?
"posting some related questions" -- is that a typo? Should it be posing? Either way I'm not quite sure what it means. 

However: It does not seem you are in danger of getting the paper rejected. You should write a polite response letter, list all of the changes suggested by the reviewer(s), respond to each one (e.g., "Done." or "We opted not to do this because..."), and thank the review team. If you do not follow the suggestion to "post some related questions," explain why not.

Congratulations. This seems like a good outcome for your paper.