Final answer:
(Option 1)The distance between point B and point C on Haley's timeline represents her age in years, correlating with the first option provided.
Step-by-step explanation:
The distance between point B, which marks the moment of Haley's birth, and point C, which measures the current time, is the measure of Haley's age. This distance on a timeline is best described by Option 1: The distance between the two points is defined as her age in years. A timeline is a graphical representation of a period of time, in which events are shown in the order they happened. Therefore, in this context, distance and time are directly correlated, and the distance on the timeline would represent the amount of time that has passed, which in this case is Haley's age.