Collector for ArcGIS is useful in collecting and updating data directly from mobile devices, which increases data accuracy. In some instances, it is desirable to select more than one option for certain fields using check boxes. However, it is not possible to create check boxes in Collector for ArcGIS.
As an alternative, use Survey123 for ArcGIS and create check boxes using the multiple choice question type or use Survey123 Connect for ArcGIS with the select_multiple (select multiple answers) question type. Refer to Survey123 for ArcGIS: Multiple choice questions for more information.
The following images show the survey tab and the corresponding options on the choices tab of the XLSForm.