Because that's the way it works and there is probably another strong reason
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
I think it it is a closed ended question, because it has a simple, one word answer (yes or no)
Answer:
We have organized them into eight broad perspectives: the systems perspective, conflict perspective, exchange and choice perspective, social constructionist perspective, psychodynamic perspective, developmental perspective, behavioral perspective, and humanistic perspective.
Explanation: