The high level of pesticides in top predators like eagles and raptors may be attributed to?a.The principle of exclusionb.Cycling of nutrients by decomposersc.Ecological successiond.Biological magnification

The high level of pesticides in top predators like eagles and raptors may be attributed to d. Biological magnification.

Here's why:

Biological magnification, also known as biomagnification, refers to the process where certain substances (like pesticides or heavy metals) become more concentrated in organisms as you move up the food chain.

Here's how it works, step by step:

1. Pesticides are often used in farming and can end up in water bodies through runoff.

2. Small organisms like plankton in the water bodies absorb these pesticides.

3. Small fish eat a large number of these plankton and thus ingest the pesticides accumulated in the bodies of the plankton.

4. Larger fish or birds then eat many of these smaller fish, ingesting all the pesticide that was in the bodies of the small fish.

5. This process continues up the food chain, with each level accumulating more pesticide than the last.

6. By the time you get to top predators like eagles and raptors, the level of pesticides can be dangerously high. This is because they are eating prey that have accumulated pesticides in their bodies, and those prey have eaten other organisms that have done the same, and so on.

So, the high level of pesticides in top predators is a result of biological magnification.