Final answer:
A business letter includes the heading/date line, inside address, salutation, body, closing, signature, and typed name. Lists with bullets and objectives are generally not included in a formal business letter structure.
Step-by-step explanation:
The parts of a business letter are essential for maintaining a professional tone and structure. These include the heading/date line, which features the date when the letter is written. Next is the inside address, containing the recipient's information such as name, title, and organization address. A salutation opens the letter with a formal greeting using the recipient's title and last name. The body of the letter conveys the main message, formatted in a clear and concise manner, with single spacing and a double space between paragraphs. A closing line such as 'Sincerely' or 'Thank you,' followed by a comma ends the letter officially. Lastly, the sender's signature is handwritten, and the typed name is included right below the signature.