Final answer:
A thank-you message can be handwritten for a personal touch, printed on letterhead for formality, or sent electronically for efficiency.
Step-by-step explanation:
Depending on the situation, a thank-you message can be handwritten, printed on letterhead, or sent electronically. The choice between these options depends on the recipient and the context. A thank-you message can be handwritten for a personal touch when you want to show extra appreciation and create a more intimate connection. On the other hand, printing on letterhead can be appropriate for formality, such as when communicating with business associates or clients. Finally, sending an electronic thank-you message can be efficient and convenient, especially when the recipient prefers digital communication or the situation requires a quick response.