Question

The progressive accumulation of some non biodegradable chemicals through the food chain is known as

Answer 1

The progressive accumulation of some highly non-biodegradable chemicals thorough the food chain is nothing other than bio magnification.

It results in increase of trophic level. It is the increase in level of concentration of a substance like toxic chemical in tissues of organisms at successively high levels in food chain.

Answer 2

Bio-magnification.

Bio-magnification can also be known as the biological magnification of bio amplification. The process of increasing concentration of toxic chemicals in the tissue of an organisms which are thriving at the higher level of a food chain is known as bio-magnification.

Bio-magnification is a result of  

Persistence

Food chain energetic

Excretion of substance