Question

what is the main concern about toxic chemicals in the oceans? they are easily eliminated by natural processes. they are harmless and only affect marine species. they can bioaccumulate and enter the food chain

Explanation:

Toxic chemicals in oceans are a concern because they can bioaccumulate in organisms and move up the food - chain, potentially causing harm to higher - level consumers including humans. They are not easily eliminated by natural processes and are not harmless.

Answer:

They can bioaccumulate and enter the food chain