Final answer:
Alex's behavior can be described as inducing his client to insure.
Step-by-step explanation:
Alex's behavior can be described as b) Alex induced his client to insure. By withholding important information about the coverage of the policy, Alex influenced Linda's decision to purchase the critical illness insurance policy, even though it did not cover her main concern of Type 2 diabetes. This is known as inducing the client to insure, as Alex's actions led Linda to make the purchase based on incomplete or misleading information.