Because it is easier to have a chain of command established with the staff if only one person is the leader. Companies and corporations also save money in the practice of only having a single leader or "boss."
I don't know if that answer will exactly help. :)
That would be a <span>portosystemic shunt.
Hope it helps!</span>
School I would definitely say school because with education and jobs
The displacement of a bone end from a joint is called :
-b. a dislocation.