Question

ddt lasts a long time in the environment. it can magnify up the food chain, which means if a small animal eats something with ddt, then a larger animal eats small animals with ddt, there will be even more ddt in the larger animal. what is the term that we use to describe this phenomenon?
eutrophication
biomagnification

Explanation:

Biomagnification refers to the process where the concentration of a substance (like DDT) increases as it moves up the food chain. Eutrophication is about excessive nutrients causing algal blooms, etc., which is different from the described DDT - concentration - increasing - up - the - food - chain phenomenon.

Answer:

Biomagnification