Which concept involves the preservation of goods or property at risk of damage?

The concept that involves the preservation of goods or property at risk of damage is salvage. Salvage specifically refers to the process of recovering and preserving damaged property or goods in order to minimize losses. This is particularly important in the context of insurance, where salvaged items can help reduce the insurer's payout liability after a loss event. The aim is to protect and recover as much value as possible from items that might otherwise be completely lost or devalued.

Considering the context of the other options, perils of the sea refer to specific risks or dangers associated with maritime transport that can lead to losses, but they do not specifically address the concept of preserving property. Actual loss pertains to the specific financial loss that has occurred, and while it relates to the outcome of damage, it does not involve the active preservation of goods. Underwriting refers to the process of evaluating risks to determine the terms of insurance coverage and is unrelated to the concept of preservation.