While manually creating an Open-Ended exercise to your content, you will have the option to add 4 different types of input for your question:
Text - To add a phrase
Image - To insert an image to your question (you can upload or insert a link)
Video - To insert a video to your question (you can upload or insert a link)
Audio - To insert an audio to your question (you can upload or insert a link)
Choose a type of input to insert
Insert the question
Move to the Explanations section
Enter the reason why the question is true or false (optional)