Answer: The tone and the appropriate language of a business letter that is a complaint should be polite and formal.
Step-by-step explanation:
When writing out a complaint letter to a business, the tone should always be formal and polite. The person writing the letter should assume that the person who reads the letter will be willingly to help resolve their complaints with the company. Make the letter is precise and to the point. The letter needs to be written to the main business office or to the district manager.