You can create polls to your event site under Audience interactions.
Go to Polls and start by choosing the type of the poll
There are 4 different poll types
In all poll types, you can add open text field by clicking "Add extra field". You can also allow multiple answers, as well as show the poll results immediately to the attendees.
General settings - appearance:
Modify the button texts shown in polls
Enable onsite polls for hybrid event, where you have live and remote attendees. If you'd like to use this feature, please contact [email protected]