NOTE: there are several questions, including the intros, that only work with pre-popluated fields. The form will not function properly with the main URL.
The direct URLs to be used can be found under:
Publish > Prefill > Manual Prefill
To get a URL, click on the 3 dots to the right of the desired URL and click "Copy URL". You can then paste it whereever needed.
The URLs used in the iFrame code on the Nature Explore website pages were generated using the PrePopulate Forms tool which can be found here: