The exact mechanism refers to a specific, detailed and precise explanation or description of how something works. It is an accurate account of all the steps involved in a process or system, providing information on what causes each step to happen and why it leads to the desired outcome. In other words, it provides a clear understanding of how every component interacts with one another to produce the final result. The term can be used in various fields such as science, engineering, medicine, economics, among others, where there is a need for precise information on how something operates or functions.