The Reason Why
The Reason Why is an Alliance-only quest for level 7-30 in Ashenvale. It rewards 1 reputation reward, 4,100 experience and money.
Description
The furbolg have descended from the heights and overrun the Ruins of Ordil'Aran to the north. I believe they did so because they were attracted to what the dead cultists there uncovered: three moonstones.
Liladris Moonriver will counsel you to deal with the furbolg in a more direct manner, and I will not gainsay her, but I would ask that you go to the ruins and deactivate the moonstones.