Final answer:
A flow unit is the basic unit that moves through a process.
Step-by-step explanation:
The correct answer is B) the basic unit that moves through a process. A flow unitrefers to the basic unit that moves through a process. It can be a physical object, such as a customer in a queue or a product in a manufacturing line, or it can be an abstract entity, such as data moving through a computer system. Understanding the flow unit helps in analyzing and managing processes, as it allows for the identification of bottlenecks and inefficiencies.