The basic unit of volume in the metric system is c) liter.
The liter is widely used to measure liquids and is a fundamental unit within the metric system, which is based on powers of ten. A liter is equivalent to 1,000 cubic centimeters (cm³) and can be thought of as the volume occupied by one kilogram of water at its maximum density. This relationship makes the liter particularly useful in various scientific fields and everyday life, especially in cooking and beverage measurement.
Let’s explore the other options:
- a) Kilo: Kilo is a prefix in the metric system that denotes a factor of one thousand (1,000). It is often used in conjunction with other units (e.g., kilogram for mass), but it is not a standalone unit of volume.
- b) Millimeter: Millimeter is a unit of length in the metric system, equivalent to one-thousandth of a meter. While it can be used in volume calculations when used in conjunction with other length measurements, it is not a unit of volume by itself.
- d) Centimeter: Centimeter is also a unit of length in the metric system, equal to one-hundredth of a meter. Similar to millimeters, centimeters can be used to calculate volume when measuring the dimensions of a three-dimensional object but do not represent volume on their own.
In conclusion, when discussing volume specifically, the liter is the metric unit you would refer to, making it the correct answer to the question.