The correct answer is: d) All of the above
Traditional fish preservation methods in Kerala include drying and salting, smoking, and fermentation.
Drying and salting is a method of preserving fish by removing moisture from the fish. This can be done by air-drying, sun-drying, or smoking. Drying and salting helps to prevent the growth of bacteria and other microorganisms that can spoil the fish.
Smoking is a method of preserving fish by exposing it to smoke. The smoke helps to kill bacteria and other microorganisms, and it also adds flavor to the fish.
Fermentation is a method of preserving fish by converting the sugars in the fish into acids. This process helps to prevent the growth of bacteria and other microorganisms, and it also adds flavor to the fish.
All of these methods are effective in preserving fish for long periods of time. They are also relatively simple and inexpensive to do.