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Answer:
A position from which to measure future distance a way to detect an object motion.
A reference point provides a position from which to measure future distance.
A reference point is a location or point in space that serves as a criterion that is used to determine an object in motion. When an object moves in relation to a reference point, it is said to be in motion.
Therefore, we can conclude that a reference point is also used to determine a position from which we can draw a line to measure a future distance.
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