What process describes the gradual increase of pesticide concentration in organisms at different levels of a food chain?

Biomagnification is the process that describes how pesticide concentration increases in organisms as you move up the food chain. It occurs when predators consume prey that have accumulated pesticides in their bodies from their environment. As each predator eats several pieces of prey, the concentration of toxins, such as pesticides, builds up in their tissues over time. This can lead to significant health problems not only for the organisms affected but also for the ecosystems and human populations that rely on these food chains.

Biosynthesis refers to the natural process by which living organisms produce complex compounds from simple substances, which is not related to concentration changes in a food chain. Bioabsorption pertains to the uptake of substances through the cell membranes, and while it plays a role in how organisms absorb chemicals, it does not describe the cumulative effect seen in food chains. Biotransformation refers to the chemical modifications made by an organism on a chemical compound, which is more about the metabolism of chemicals within an organism rather than their concentration across different levels of a food chain.