Final answer:
Business letters offer a higher degree of formality and professionalism, which is crucial for successful professional communication and in various formal exchanges.
Step-by-step explanation:
Business letters provide a higher level of formality and professionalism that is essential in professional communication. Unlike casual or academic writing, a business letter must adhere to a formal style and standard format to effectively convey a message in professional settings. Whether you're contacting a congressman, asking for a refund, or inquiring about a job, the structure and tone of a business letter can greatly impact the outcome.
Conciseness and clarity are vital in business correspondence; using slang, contractions, or text language such as 'u' instead of 'you' is unacceptable. A well-crafted business letter can help you to be taken seriously, and often reflects your understanding of business etiquette. Moreover, it can be instrumental in rhetorical strategies, especially when you wish to sell an idea, candidate, product, or strategy.