Final answer:
The risk of a key member being struck by lightning is typically handled by transferring it through insurance, as the consequences of such a low-probability event can be significant.
Step-by-step explanation:
The risk associated with the unlikelihood that one of the key members will be struck by lightning would most likely be handled by transferring the risk. This is typically done through purchasing insurance, which allows an organization or individual to transfer the financial burden of such a low-probability but high-impact event to an insurance company. While the probability of the event is extremely low, the consequences would be significant, therefore it is not ignored, mitigated, retained, or avoided, but rather transferred to manage the potential financial impact more effectively.