Fundamental units are the basic units of measurement that are used to define all other units in a system of measurement. These units are chosen based on physical quantities that are considered to be fundamental and cannot be expressed in terms of other units.

- Fundamental units are independent of other units and are used as a base for deriving other units.
- They are consistent across different systems of measurements.
- Fundamental units are internationally recognized and standardized for accuracy and consistency in scientific measurements.

In the International System of Units (SI), some examples of fundamental units include:
- Meter (m) for length
- Kilogram (kg) for mass
- Second (s) for time
- Ampere (A) for electric current
- Kelvin (K) for temperature

- Fundamental units provide a common language for scientists and researchers to communicate measurements accurately.
- They form the foundation for deriving derived units, which are combinations of fundamental units to measure more complex physical quantities.
- By using fundamental units, measurements can be standardized and compared across different experiments and studies.
In conclusion, fundamental units play a crucial role in the field of science and measurement by providing a consistent and reliable basis for quantifying physical quantities.