Having Problem in Building Survey Form (Basic HTML & CSS)

Hey Sir, Suvey Form I have solved 14/16 tasks but am stuck on the 13th and 15th task.

1: Inside the form element, I can select several fields from a series of checkboxes, each of which must have a value attribute.

2: Inside the form element, I am presented with a button with id="submit" to submit all my inputs.

I didn't understand why the error is coming in my code. I have searched these problems on different forums such as Developer Mozilla, I understand the question and tried my 100% to solve it but didn't get the result.

I am sharing all my code, question and output on Google Drive

Please Sir Help me I am stuck here on these two problem for 1 day.

Sir, I hope that you will answer my problem sooner.

Thank You So Much Sir,