Final answer:
Standards of measurement are chosen because they are reproducible, cannot be easily destroyed, and not easily changed. An example is the meter, based on the speed of light.
Step-by-step explanation:
Standards of measurement are chosen because they fulfill several critical properties. These properties include: a. being reproducible in another laboratory, meaning they can be accurately and reliably reproduced using standard scientific equipment. b. they cannot be destroyed by any common physical or chemical means, ensuring their stability and reliability over time. And c. they are not easily changed, which maintains consistency across different uses and timescales.
For instance, the standard of length (the meter) is based on the speed of light in a vacuum, a constant that fulfills all these requirements.
Learn more about Standards of measurement