Depending on your answer type, you may see an option to mark a question as "required"
We highly recommend selecting this option when using the "Text-based answer" type. Marking it will prompt the survey taker to fill in their answer, and avoid moving them to the next step until they do so.
Marking "required" will not force a survey taker to complete all questions in a survey. Survey takers still have the option to abandon the survey if they choose not to respond, as we capture partial responses.