5. Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
5. Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as

(a) eutrophication

(b) pollution

(c) biomagnification

(d) accumulation

Correct option – ( c )

Explanation for correct option – biomagnification refers to the rise in concentration of adverese chemicals like fertilizers and pesticides  in each trophic level .

Explanation for incorrect option – eutrophication means nutrients are rich above the required level .

Pollution means introduction of unwanted substances in the atmosphere .

Accumulation means piling of something 

Hence correct option is biomagnification