Feedback (if any): Found the product is already expired and reported it to the storekeeper.
Explanation:
Elements of communication are the factors or aspects on which any information is passed on from one to another. This allows the successful 'transfer' of the information and completes the cycle of transmitting information whether it be from a source to a receiver.
In the given passage, the elements of communication are as follows-
Message: Gerry bought a can of milk at the store.
Receiver: Shopkeeper.
Feedback: Found the product is already expired and reported it to the storekeeper.