Which term describes the process whereby toxic substances increase along trophic levels of an ecosystem?
biomassification
biomagnification
bioentropy
heterotrophy

biomagnification

Explanation:

Biomagnification is a negative event originating from a significant amount of waste or toxic substances accumulated at a trophic level of the food chain, capable of reaching other trophic levels of the chain, damaging the balance of the organisms involved, as they will absorb these substances in the future.

The excess of these substances poses a direct threat to the plant and animal organisms present in the environment. The indirect form occurs through ingestion of contaminated food. In the second situation the man is also harmed.

oak trees? ? what was listed

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.