The diagram below shows the radial velocity curve of a double-line spectroscopic binary. Based on this radial velocity curve, which of the following statements is correct 
Definitions:
Closure
The psychological phenomenon where an individual seeks a sense of completeness or resolution to an emotional or traumatic event.
Similarity
The cognitive process of recognizing objects or ideas that are alike in appearance or concept.
Texture Gradient
This visual cue indicates depth by the gradual change in appearance of objects as they move further away, with details becoming denser and finer the farther they are from the viewer.
Relative Size
A perceptual cue that allows the determination of the size of an object in comparison to another object of known size.
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