Final answer:
The absolute value of a number indicates its distance from zero on a number line. It is always a non-negative number and represents the magnitude of the number without regard to its sign.
Step-by-step explanation:
The absolute value of a number gives its distance from zero. The correct answer is A) Absolute value. The absolute value is always non-negative and is represented by two vertical lines on either side of the number, for example, |x|. It reflects the magnitude of a real number regardless of its sign.
For instance, the absolute value of -5 is 5, and the absolute value of 5 is also 5. Both numbers are 5 units away from zero on the number line. The key concept here is that absolute value is used to determine how far a number is from zero, which is its distance in a numerical sense without considering the direction.