Final answer:
The most precise measuring tool is a micrometer.
Step-by-step explanation:
An important factor in the accuracy and precision of measurements is the precision of the measuring tool. In general, a precise measuring tool is one that can measure values in very small increments. For example, a metric machinist's rule and a decimal machinist's rule can measure length to the nearest millimeter, while a micrometer can measure length to the nearest 0.001 millimeter. The micrometer is the most precise measuring tool because it can measure extremely small differences in length. The more precise the measuring tool, the more precise and accurate the measurements can be.