Marine Insurance
Marine insurance is a type of insurance coverage that provides protection against risks associated with marine activities, including the transportation of goods or passengers by water, such as ships, boats, and other watercraft. This type of insurance is designed to cover the losses or damages that may occur during the transit of goods or passengers by sea, rivers, or other waterways.

Types of Marine Insurance Coverage
There are various types of marine insurance coverages available, and each is designed to address specific risks associated with marine activities. Let's analyze the given options to determine which one is covered under marine insurance:

1. Whole Life Policy:
- Whole life insurance is a type of life insurance policy that provides coverage for the entire life of the insured.
- This type of insurance is not directly related to marine activities and is typically not covered under marine insurance. Therefore, option 'a' is incorrect.

2. Liability Insurance:
- Liability insurance provides coverage for legal liabilities arising out of the operation of ships or other watercraft.
- It protects the insured against claims or lawsuits brought by third parties for bodily injury, property damage, or other losses.
- Liability insurance is an essential component of marine insurance and is commonly included in marine insurance policies. Therefore, option 'b' is correct.

3. Endowment Policy:
- An endowment policy is a life insurance policy that provides a lump-sum payment to the insured after a specific term or upon the insured's death.
- Similar to a whole life policy, endowment policies are not directly related to marine activities and are typically not covered under marine insurance. Therefore, option 'c' is incorrect.

4. Act Only:
- It is unclear what 'act only' refers to in the context of marine insurance.
- However, if it refers to a type of insurance policy that covers only specific acts or events related to marine activities, it may be covered under marine insurance.
- Without further clarification, it is difficult to determine the accuracy of option 'd'. However, based on the information provided, it is more likely that option 'b' is the correct answer.

In summary, marine insurance primarily covers risks associated with marine activities, such as the transportation of goods or passengers by water. While liability insurance is commonly included in marine insurance policies to protect against legal liabilities, other types of life insurance policies, such as whole life and endowment policies, are typically not covered under marine insurance.