You are presented with the quiz "what has a negative impact on an organism's survival?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "eating something that contains pollutants has a negative impact on an organism 's survival" and "lakes have been found to be polluted with mercury, rendering fishes unsafe to eat". 

So, what's the best answer to the question?


 

       eating mercury    