The reaction which occurs at the anode is:
Cu(s) → Cu2+ (aq) + 2e-
This is referred to as the positively charged electrode and is the region in an electrochemical cell where oxidation takes place.
The copper undergoes oxidation at the anode to form copper(II) ion with a corresponding reduction of silver(I) to silver metal at the cathode thereby depicting it as a redox reaction and making it the most appropriate choice in this scenario.
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