The correct answer is d) All of the above.
Bottom trawling is a type of fishing that involves dragging a net along the seabed. This can damage coral reefs and other sensitive habitats, and can also catch non-target species, such as turtles and dolphins.
The use of dynamite is a destructive fishing practice that involves exploding dynamite underwater to stun or kill fish. This can damage coral reefs and other sensitive habitats, and can also kill non-target species, such as turtles and dolphins.
Cyanide fishing is a destructive fishing practice that involves using cyanide to stun fish. This can kill non-target species, such as turtles and dolphins, and can also damage coral reefs and other sensitive habitats.
All of these practices are illegal in Kerala, but they continue to be used by some fishermen. They are all harmful to the environment and to the fish stocks that they target.