The correct preposition to complete the sentence "Don't loiter _______ the street." is "on"OPTION 2.

When we say "loiter on the street," it implies being present or lingering around the street without any specific purpose or activity. "On" is the appropriate preposition here because it indicates the location where the loitering is occurring.

Using "in" would suggest being inside something, which doesn't make sense in the context of loitering on a street. "Into" implies movement toward the inside of something, which is also not suitable in this context. "Of" doesn't convey the location of the loitering either. Therefore, "on" is the correct preposition to complete the sentence.