Answer:
"A-re" is a more colloquial form of "so-re," which both mean "that [object]."
It is similar to "ko-re," which means "this [object]."
in a more conversational sense, its Kore (this) Sore(that) Are(that over there)
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Alternatively, 'are' is a verbal exclamation indicating confusion, like someone saying 'huh?' or 'wait, what?'.
Improvement:
'Sore' means 'that' and is used in case of referring something close to the listener and far from the speakr. 'Are' also means 'that' and is used when the object of referrence is far from both listener and speaker.