This is the third option we have on the list. This option is very similar to the second option called CHECKBOX. The only difference between CHECKBOX and RADIOGROUP is Checkbox can give you multiple choices to choose from a list however, in Radiogroup you can choose only one answer from a list.
Simply rename the items and your choices and save the survey. For more details please see the below image, each and every options is highlighted.
Please watch the below video for a better view.