The two main categories under which marine losses fall into are?

The two main categories under which marine losses fall into are "total loss" and "partial loss." Total loss refers to a situation where a vessel is completely destroyed or lost beyond recovery, or when the cost of repairs exceeds the insured value of the vessel. In such cases, the insurer pays the full insured value of the vessel to the policyholder. Partial loss, on the other hand, refers to a situation where the vessel sustains damage that can be repaired or where some of the cargo is lost or damaged during transit. In such cases, the insurer pays a proportionate amount of the insured value, depending on the extent of the damage or loss. Therefore, the third option, "total loss and partial loss," is the correct answer.