The correct answer is: A) Completely banned
Ivory carving was a traditional craft in Kerala, but its practice is now completely banned. The ban was imposed in 2017 in order to protect elephants, which are poached for their ivory tusks. The ban has had a significant impact on the ivory carving industry in Kerala, and many artisans have been forced to find other ways to make a living.
Option B is incorrect because ivory carving is not highly regulated. The ban on ivory carving is a complete ban, and there are no exceptions.
Option C is incorrect because ivory carving is not thriving commercially. The ban on ivory carving has had a significant impact on the ivory carving industry in Kerala, and many artisans have been forced to find other ways to make a living.
Option D is incorrect because ivory carving is not limited to temples. The ban on ivory carving applies to all ivory carving, regardless of where it is done.