Which of the following processes describes how missionary activities change the geographies of universalizing religions outside of their founding hearths?

The correct answer to this open question is the following.

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The process that describes how missionary activities changed the geographies of universalizing religions outside of their founding hearths was Expansion Diffusion.

This is the process that happens when a major nation introduces and expands its culture, tradition, customs, or religious beliefs into other nations. It could be through conquering and colonizing as was the case of the Spanish crown which sent its religious congregations such as the Franciscans to evangelize the Native Indians into the Catholic religion.