When the lighter was relit, Polpo's Stand, Shadow Sabbath, appeared and attacked. Giorno is able to see through Shadow Sabbath's weakness and faces it alongside Koichi. Koichi realizes that the arrow is involved in this situation and they realize that the point of Polpo's exam is to try to create more Stand users.
That's what it meant by the "chosen one"!
!"هذا ما قصدَه بـ"المُختار
Das war also mit
Auserwählter gemeint!
A eso se refería con "los elegidos".
A eso se refería con "los elegidos".
Ecco a chi si riferiva, 
quando parlava di essere "prescelti"!
É isso que ele quer dizer com "escolhido!"