Final answer:
The policy-owner needs to provide evidence of insurability to increase the death benefit.
Step-by-step explanation:
The correct statement regarding increasing the death benefit of an adjustable life policy is that the policy-owner needs to provide evidence of insurability. This means that the policy-owner will need to demonstrate that they are in good health and insurable according to the insurance company's underwriting guidelines. Providing evidence of insurability helps the insurance company assess the risk associated with increasing the death benefit and determine the appropriate premium to charge.