I am confused. Who ranks it that way and what does its rank have to do with undergraduate education and oppurtunities? Those rankings never have anything to do with that. Also, at ECAS, you do not apply for MAJORS. You just apply for admission into ECAS and all majors become available.
Here is US global ranking which put it at 24 https://www.usnews.com/best-graduate-schools/top-humanities-schools/emory-university-139658 but that nor any other ranking can actually capture how strong the program is for undergraduate
And to be clear it is extremely strong for that, and offers tons of opps and special programs:
That is what you look for in terms of determining the strength of an undergraduate program in something, not any ranking (which rates research productivity http://polisci.emory.edu/home/undergraduate/index.html
Just go on there and look for things you like