​ODOMETER: DISTANCE

Given: ​ODOMETER: DISTANCE

The relationship in the given "ODOMETER measures DISTANCE."

Lets check all options;

Option (a): Scale : Weight (True)
A scale is a device used to measure weight.

Option (b): Inch : Foot (False)
An inch is a unit of measurement, and a foot is another unit of measurement (12 inches equal 1 foot).

Option (c): Mileage : Speed (False)
Mileage refers to the distance traveled, and speed refers to how fast something is moving.

Option (d): Length : Width (False)
Length and width are dimensions of an object, describing its size.​​

So option (a) is match, as an odometer measures distance just like a scale measures weight.

Thus, the correct answer is (a).