What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?

Explanation

Some harmful non-biodegradable substances enter the food chain at the level of primary producers and gets accumulated in the food chain at different trophic levels. Progressive increase in the concentration of non-biodegradable substances in a food chain is called biological magnification. As these substances are non-biodegradable, levels of their concentration keep on increasing from lower trophic level to higher level. Humans being on the top of the food chain, also get these harmful substances in our body which results into various health problems.