Which of the following is NOT a main type of insurance?

The classification of insurance typically includes types such as life insurance, health insurance, and liability insurance. Life insurance provides financial support for beneficiaries upon the policyholder's death, while health insurance covers medical expenses for the insured, including hospital stays, surgeries, and preventative care. Liability insurance protects individuals and businesses from legal claims due to negligence or wrongdoing that results in injury or damage to others.

Investment insurance, on the other hand, is not recognized as a main type of insurance in the traditional sense. While some financial products may combine elements of insurance and investment, such as variable universal life insurance, these are not categorized as standalone types of insurance. Hence, investment insurance does not fit into the conventional framework of insurance categories. This distinction clarifies that investment insurance does not operate as a primary form of coverage like the others listed.