Final answer:
Hangarkeeper's Liability insurance is designed for businesses handling third-party aircraft storage or repairs, protecting against damage or loss of aircraft in their custody.
Step-by-step explanation:
The correct answer to the question, which covers liability for loss to aircraft being stored or repaired by the insured, is A) Hangarkeeper's Liability. Hangarkeeper's Liability insurance is specifically designed to cover businesses that are responsible for the care, control, and custody of third-party aircraft that are being stored or repaired in their hangar. This type of insurance is critical for operators of storage facilities and maintenance services for aircraft, as it protects against claims arising from damage or loss to aircraft under their supervision, which is not typically covered under a standard aviation policy.