Final answer:
Letters instead of regular reports are accepted in agricultural settings for documenting significant natural events affecting crops, and in business for formal communication on various matters.
Step-by-step explanation:
Letters instead of regular reports are only accepted in specific conditions relevant to agrarian concerns, as well as in more formal business or administrative contexts. For example, in the case of agricultural reports, a written letter is necessary when there's an occurrence of natural events such as beneficial rain that affects the grain in the ear, droughts, violent winds, floods, or infestations that harm crops. Detailed reports about the acreage and state of the crop must be provided. Similarly, in a business environment, business letters serve as a formal means of communication. They are used to address concerns, request refunds, voice opinions to politicians, or inquire about job openings. In both scenarios, formal communication ensures proper documentation and facilitates an official record that can be referenced in the future.