Toxins are dumped into a lake. Which of the following is not a likely consequence?

Plankton in the lake absorb the toxin.
Large fish in the lake register moderate levels of the toxin.
A baby bird living in a nest 2 miles from the lake shows high levels of the toxin in its system.
The toxin will remain contained in that lake.

Question

Toxins are dumped into a lake. Which of the following is not a likely consequence?

Plankton in the lake absorb the toxin.
Large fish in the lake register moderate levels of the toxin.
A baby bird living in a nest 2 miles from the lake shows high levels of the toxin in its system.
The toxin will remain contained in that lake.

anonymous · Answer

The toxin will not be contained in the lake. Lets say the plants are contaminated, bugs/small fish eat the plants, larger fish eat the contaminated small fish, birds eat the contaminated big fish, other predators eat the birds, and so on. The toxin will spread through the food chain, so D is correct for what is not likely.