These buildings were sometimes even over 5 meters long and were made out of bricks that were stacked on top of each other. The constructions are huge and there are many anthropologists who claim that these constructions are second in their greatness only to the great pyramids in Egypt because of how massive and unique they are.
push means it literally pushes them away from their home. All the other options reflect something that either is a pull (something that they want, so they move there) or a reason to stay. This is a push because they wouldn't want to live in a home that doesn't tolerate their religion
Answes: The first was Christianity and the Catholic Church (as well as the official language of the Church, Latin). The second was feudalism. The expansion of Catholic Christianity and the feudal system had a profound impact on western Europe in the medieval era.