Choose right statement of flows :

Over a period of time

The correct answer is option (4) : Over a period of time

Flows are defined over a period of time.

The statement "Over a period of time" implies that the flows are measured and considered over a specific duration, indicating a temporal aspect. This could refer to various types of flows, such as financial transactions, data movement, or any other measurable quantity that occurs and is observed or recorded over a specified timeframe.