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------------------------------------------------ Yuri measures the volume of the water in an aquarium. He then moves the decimal point in the measurement three units to the left. Which pair of measurements might he be converting? Use the metric table to help answer the question.

\[
\begin{tabular}{|c|c|c|c|c|c|c|}
\hline
\multicolumn{7}{|c|}{\text{Metric Table}} \\
\hline
\text{kilo-} & \text{hecto-} & \text{deka-} & \text{unit} & \text{deci-} & \text{centi-} & \text{milli-} \\
\hline
1,000 & 100 & 10 & 1 & 0.1 & 0.01 & 0.001 \\
\hline
\end{tabular}
\]

A. kiloliters to liters
B. centiliters to hectoliters
C. liters to deciliters
D. deciliters to hectoliters

To solve the problem, we need to understand what it means to move the decimal point three units to the left in a given measurement. Moving a decimal point three units to the left is equivalent to dividing the measurement by 1000.

Now, let's consider each pair of measurements and convert them to see if one of them involves dividing by 1000:

1. Kiloliters to Liters:
- 1 kiloliter (kl) = 1000 liters (l).
- This means we multiply kiloliters by 1000 to get liters or, conversely, divide liters by 1000 to convert to kiloliters.
- Example: 1 kiloliter = 1000 liters -> Moving the decimal point three units to the left: 1000 liters becomes 1 kiloliter.

2. Centiliters to Hectoliters:
- 1 centiliter (cl) = 0.0001 hectoliters (hl).
- This conversion involves dividing by 100,000 (since cl to l is divided by 100, and l to hl is divided by 100).
- Moving the decimal point three units to the left would imply a factor of 1000 which does not match this conversion.

3. Liters to Deciliters:
- 1 liter (l) = 10 deciliters (dl).
- This means multiplying liters by 10 to get deciliters or dividing deciliters by 10 to get liters.
- Moving the decimal point three units to the left means a factor of 1000, which does not match this conversion (only a factor of 10 is used here).

4. Deciliters to Hectoliters:
- 1 deciliter (dl) = 0.001 hectoliters (hl).
- This means dividing deciliters by 1000 to get hectoliters or multiplying hectoliters by 1000 to get deciliters.
- Example: 1 deciliter = 0.001 hectoliters -> Moving the decimal point three units to the left: 1 deciliter becomes 0.001 hectoliters.

Comparing these conversions, kiloliters to liters involves moving the decimal point three units to the left because 1000 liters are equivalent to 1 kiloliter.

Therefore, the correct pair of measurements Yuri might be converting is Kiloliters to Liters.