Concept:Insurance is a risk management tool that provides financial compensation for unexpected losses such as fire.Explanation:A trader who suffers loss through fire has an insurable risk.Insurance companies collect premiums and promise to cover specific risks like fire damage.When fire occurs, the trader can claim compensation from the insurance company.A trade association, bank, or advertising agency does not provide this kind of loss restoration.Thus, the right institution to restore the trader is an insurance company.Answer:A. an insurance company