What quantity do units represent in a value?

A. Size

B. Direction

C. Magnitude

D. Dimension

(APEX)

dimension is the answer

Answer : Magnitude

Explanation:

In a value, the magnitude is represented by its units. It can be adopted by convention or by law.

Magnitude of any unit is used to measure the same kind of quantity.

For example: The unit of length which is a physical quantity is meter (m).

So, magnitude is correct answer.