In the metric system, which unit represents time?

In the metric system, the unit that represents time is the second. The second is defined as the base unit of time in the International System of Units (SI), which is part of the metric system. It serves as the foundation for other units of time, such as minutes and hours, which can be expressed in terms of seconds (for example, one minute equals 60 seconds and one hour equals 3,600 seconds). While hours, minutes, and days are commonly used measurements of time, they are derived from the fundamental unit, the second, and are not considered base units within the metric system. Therefore, the second is the correct choice as it aligns with the defined structure of the metric system.