What is the definition of cash flow?

Cash flow refers to the amount of money moving in and out of an account over a specific period of time. This concept is crucial for personal finance, as it provides insight into an individual's financial health and ability to manage expenses. Positive cash flow occurs when incoming funds, such as salary or other income, exceed outgoing funds, allowing for savings and investments. Understanding cash flow helps individuals make informed decisions about budgeting, expenditures, and long-term financial planning.

The other definitions, while related to finances, focus on different aspects. Total debt pertains to liabilities, savings and investments relate to the accumulation of wealth, and the monetary value of physical assets emphasizes ownership rather than cash movement. Thus, these concepts do not capture the dynamic nature of cash flow as accurately as option B does.