Required field checkbox in product page - dawn theme

Hi - I am trying to make an edit to the main-product.liquid file to make the tick box a required field. I have the following code but I’m not sure how to edit it to make it mandatory (i.e. “Yes, I understand” has to be ticked in order to add to cart):

I understand my order will be posted 4-8 weeks after the image has been received.

Yes, I understand.

Hi @Ankita31 ,

This is PageFly - Free Landing Page Builder.

Please share with me your store URL and that product page URL - password if password protected so I can take a look into it. Thank you.

Best regards,

PageFly