Final answer:
The risk response adopted by an organization buying insurance is 'transfer', as the financial burden of a risk is shifted to an insurer.
Step-by-step explanation:
When an organization decides to purchase insurance as a means of dealing with potential risks, the risk response or treatment approach that has been adopted is known as transfer. By purchasing insurance, the organization transfers the financial consequences of a risk event to an insurance company, thereby reducing its own burden in the event that the risk materializes. The insurance company assesses and charges premiums based on risk factors, attempting to ensure that high-risk entities are identified and charged appropriately to avoid adverse selection and maintain the viability of the insurance market.