If you select the `Indoor` radio button and submit the form, the form data for the button is based on its `name` and `value` attributes. Since your radio buttons do not have a `value` attribute, the form data will include `indoor-outdoor=on`, which is not useful when you have multiple buttons.
Add a `value` attribute to both radio buttons. For convenience, set the button's `value` attribute to the same value as its `id` attribute.
Both radio buttons should have a `value` attribute. Check that there is a space after the opening tag's name and/or there are spaces before all attribute names.
The `Indoor` radio button's `value` attribute should be set to `indoor`. You have either omitted the value or have a typo. Remember that attribute values should be surrounded with quotation marks.
The `Outdoor` radio button's `value` attribute should be set to `outdoor`. You have either omitted the value or have a typo. Remember that attribute values should be surrounded with quotation marks.