Concept:A farm liability is an obligation that the farm owes to an outside party.Explanation:Accounts payable represents money owed by the farm to suppliers or creditors, so it is a liability.Cash in bank is an asset because it is owned by the farm.Prepayment is an advance payment made by the farm, and it is treated as an asset.Accounts receivable refers to money owed to the farm by customers, so it is also an asset.Only accounts payable qualifies as a liability.Answer:A. accounts payable