Answer: The answer is D
explaination : The statement d best describes the outcome of heavy metal pollution in aquatic environments. In this case, mercury present in the environment can be transformed by certain bacteria into a more toxic form called methylmercury. Methylmercury can then bioaccumulate and biomagnify in the aquatic food chain, posing a threat to aquatic life and potentially to human health if consumed through the consumption of contaminated fish or seafood.