An indicator that orients when describing a motion is called c) the reference point.
A reference point is a location or object used for comparison to determine if something is moving. An object will be in motion if it changes the position relative to a reference point. Objects that are fixed with respect to the earth, such as buildings, trees, and signs, are good reference points.
ORIGIN - The point at which an object begins to move or is affected by motion. - It's not fictional. - Helps calculate the distance traveled from the start point to the endpoint. REFERENCE POINT - An arbitrary point taken in an object's path to determine its position relative to its movement.
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