Here's why:
* Prepositions show the relationship between a noun or pronoun and another word in the sentence. They often indicate location, time, direction, or manner.
* Beneath, among, throughout are all prepositions.
* Beneath indicates location (below something).
* Among indicates location (within a group).
* Throughout indicates location or time (covering the whole extent of something).
* Going is a verb, meaning to move or travel.