The word or term to fill in the blank of the sentence would be ''vertical'' since its combining musical notes to make better sounds.
I think that the answer is EMPHASIS ON HEAVENLY BEINGS.
Strasbourg style has the following characteristics:
1) emphasis on emotions
2) draping effect of stone clothing
3) emphasis on dramatic gestures.
I based my answer on what I read about the Strasbourg cathedral. Its art and sculptures revolve around Mama Mary, the Prophets, the 12 Apostles, and people depicted in the Bible. There is no presence of angels or any other heavenly beings.
