There are two ways for closing a survey: Expiry or Deactivation.
It is strongly recommended to use the expiry option to close a survey. - See why below:
You can manuallly expire the survey if you edit the survey details and set an "Expiry Date" - alternatively when trying to deactivate the survey an option to expire will be offered which does the same.
When you expire a survey:
To make the survey available to your participants again, change or remove the expiration date in your survey settings.
See the related article at right to learn how to change Expiry date.
Click on "Stop this survey" in the administration panel.
When you deactivate a survey: