I'm happy to help but you have an application guide, a documents checklist and help buttons for this. You need to read them and make sure you are doing it correctly. Don't rely on people here as you may get misinformation. The app guide states:
14. Tell us if you have held passports or travel documents during your “eligibility period”.
So if you've had more than one passport during the period, yes, declare and provide a copy of the bio page(s).