A non-biodegradable toxic chemical has entered into the food chain. Which type of food habit will you suggest to a man?

Non-biodegradable chemical toxins are the kind of chemicals that cannot be broken down into simpler forms with the help of natural organisms. These chemicals are called toxins because they can be hazardous to the environment and the people who consume them. 

A food chain can be described as a network of different species that range from the producers and end at the predators. 

In case a non-biodegradable toxin has been introduced into the food chain, people should prefer eating a vegetarian diet. This is preferable because, in the case of vegetables, a lot of these toxins can be removed from the surface through a thorough washing. However, in the case of a non-vegetarian diet, most of these toxins are inculcated into the organism's body and cannot be removed from a surface cleaning. Vegetarian diets would also have a lesser concentration of toxins as they will be situated at a lower trophic level. However, in a non-vegetarian diet, the toxins would be in a higher concentration.

Hence the correct option is A.