Question

toxins multiplying as they move up the food chain is known as *
phytoremediation
bioaccumulation
hypertosicity
bioremediation

Explanation:

Phytoremediation uses plants to clean up contaminants. Bioaccumulation is the increase of toxins in an organism over time. Hyperosmolarity relates to high - solute concentration. Bioremediation uses living organisms to break down pollutants. Toxins multiplying as they move up the food chain is bioaccumulation.

Answer:

bioaccumulation