I want to know the answer to the following question:
What sort of feature is created by the use of vertical elements in gallery and window tracery?
All the background I'm provided with is that "In many Gothic churches, particularly in France, and in the Perpendicular period of English Gothic architecture, the treatment of vertical elements in gallery and window tracery creates a strongly unifying feature that counteracts the horizontal divisions of the interior structure.". Is that enough to answer the question?