Please be honest. It’s perfectly fine to have responses that are very high or very low, as long as you’re being honest. To help your manager understand, please provide some explanation in the comments section as this is valuable feedback.
Take a moment and give the most honest feedback, and remember that this is about improving your workplace and part of that is giving us the information we need to support your manager. The numerical responses identify trends for the company, but you may not get the changes from your manager without supporting comments.