Final answer:
In the e-mail's complimentary closing, the student is missing a polite closing line, a professional complimentary close, and their full name. These elements are important to show courtesy and professionalism in email communication.
Step-by-step explanation:
In the e-mail's complimentary closing, the student is missing a polite closing line, a professional complimentary close, and their full name. These elements are important to show courtesy and professionalism in email communication. For example, they could use a polite closing line such as 'Thank you for your time and consideration' or 'Best regards,' followed by their first and last name.