What is the numerical value of a physical quantity?

Magnitude

The correct answer is option 4. Magnitude.

The numerical value of a physical quantity represents its Magnitude.

The numerical value of a physical quantity indicates its size or amount. It provides information about the extent or magnitude of the quantity being measured. For example, in the case of distance, the numerical value specifies how far apart two points are from each other. Similarly, for other physical quantities like mass, time, velocity, etc., the numerical value represents their respective magnitudes.