Hello,
 
Thank you for contacting us.
 
In order to HIDE/SHOW a field based on a previously selected choice, you simply need to add a rule specifying the condition (which choice to be ticked) and the fields which are meant to appear or disappear if the condition is fulfilled. I have prepared here a video on how to set up conditional logic in your specific scenario. 
 
You might also find it useful to have a look over our articles on conditional logic:
 
Guide on setting up form branching 
Show or hide form fields based on conditional logic 
 
If you have any other questions about thsi or anything else, do not hesitate to reach out and we’ll be happy to assist.