Final answer:
The metric prefix that means one tenth (1/10) is deci-. . These prefixes help us easily convert between different units within the metric system.
Step-by-step explanation:
The metric prefix that means one tenth (1/10) is d) Deci-.
The metric system uses prefixes to denote various factors of 10. The prefix 'deci-' represents one-tenth or 1/10. For example, a decimeter (dm) is one-tenth of a meter.
Other metric prefixes include 'milli-' for one-thousandth (1/1000) and 'centi-' for one-hundredth (1/100). These prefixes help us easily convert between different units within the metric system.
Learn more about metric prefixes