Answer:
Greater political freedoms
Step-by-step explanation:
Geographical "pull factors" refers to the things that influence people to move into a certain area.
Religious persecutions, ethnic conflicts, and industrial pollutions are generally negative things that people want to avoid. This will influence people to move away from a certain area.
Greater political freedoms on the other hand, tend to be something positive that people are looking for. Having such freedoms will allow people to fully express their opinion and interest on how the government should be run without having to face any repercussions from their opinion.