Final answer:
Option D best illustrates risk transfer as Robert purchases life insurance to transfer the risk of financial burden.
Step-by-step explanation:
Risk transfer is a risk management technique where an individual transfers the risk to another party, typically through insurance or contracts. In this case, the best illustration of risk transfer is option D. Robert purchases life insurance because it is less expensive than trying to save all the money his survivors would need upon his death. This means that Robert is transferring the risk of financial burden to the insurance company.