The phrase 'the complexity of the relationship' is correct and usable in written English.
You can use it when you are talking about a relationship that is complicated and requires a deeper understanding. For example: "The complexity of the relationship between parent and child means that it takes time and effort to build trust and respect."
Thus, RP is a useful way to handle complex data sets that might confound regression analysis due to the complexity of the relationship between the independent and dependent variables and due to missing information.
Data on public perceptions cannot overcome the challenges associated with the complexity of the relationship between weather and climate.
Yung said that the complexity of the relationship between Daredevil and Elektra stems from one major component: first love.
Our findings provide insight into the complexity of the relationship between beta-amyloid burden and AD-related cognitive impairment.
But each time they do, it does more to deepen the complexity of the relationship than to clarify it.
He brings out the complexity of the relationship with his father, "the ghostly luminescence" of Randolph's reputation, with Winston "straining and yearning in emulation".
The picture is a crude one, of course, and does not indicate the complexity of the relationship between stocks and flows in an industrial society.
The discrepancies among studies on the association between smoking and glaucoma may be partly due to the complexity of the relationship.
The complexity of the relationship between sleep and glucose metabolism is highlighted by the multiple pathways that are affected by sleep and SDB.
Still, the complexity of the relationship was also in plain view, particularly regarding a split over how to respond to the brutal crackdown in Syria.
"And this is not about Sam Shepard, because he is a terrific actor, but I don't think the movie gets the complexity of the relationship between Gary and my father," he says.
