Correct Answer: mercury

Solution : The correct option is mercury .

The Minamata incident occurred in the 1950s, and 1960s in Minamata, Japan, as a result of a chemical factory controlled by the Chisso Corporation releasing methylmercury into the waters of Minamata Bay. The deadly mercury compound made its way into the food chain via fish, and shellfish, which were devoured by the local populace, resulting in widespread mercury poisoning.