Final answer:
Due diligence for an agent concerning a listing most accurately involves conducting property inspections, which are integral to understanding the property's condition and any potential issues.
Step-by-step explanation:
An agent's performance of due diligence concerning a listing can best be described as conducting property inspections. Due diligence is the process through which a potential buyer of, or investor in, a property or a business investigates all the relevant facts and details about the property or business before making a transaction. For an agent, this could include verifying property ownership, investigating market conditions, and reviewing financial records. However, conducting a thorough property inspection is a key element of due diligence, as it provides the agent and potential buyer with knowledge of the property's condition, necessary repairs, potential liabilities, and other important considerations before proceeding with the purchase.