When converting metres to feet, what should be aligned with the outer scale?

When converting metres to feet using a conversion scale or a chart, it is essential to align the measurement for metres with the corresponding value for feet on the outer scale. This alignment allows for a direct and accurate conversion between these two units of length. Feet is the unit that expresses the result of the conversion, making it the correct choice for the outer scale.

The other options (litres, kilograms, and pounds) represent units of measurement for volume and weight, respectively, and do not pertain to the conversion between metres and feet, which are both units of length. Thus, they are not relevant when performing this specific conversion task.