You are presented with the question "what has a negative impact on an organism's survival?" and the following answer choices: 
- eating food
 - eating fish
 - eating water
 - liver cancer
 - Greenhouse gasses
 - fossil fuels
 - eating mercury
 - harmful substances

Now knowing 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, choose the best answer.


 

       eating mercury  