Maximum DDT is present in birds feeding on

Options

A. Fishes
B. Meat
C. Insects
D. Seeds

Answer

### Step-by-Step Solution:

1. **Understanding Biomagnification**:
- Biomagnification is the process where the concentration of toxic substances, such as DDT, increases at each successive trophic level in an ecosystem. This means that as you move up the food chain, the concentration of these substances becomes higher.

2. **Mechanism of Accumulation**:
- DDT does not get metabolized or excreted by organisms. This lack of metabolism and excretion leads to the accumulation of DDT in the bodies of organisms over time.

3. **Food Chain Example**:
- For example, if DDT is present in water, small fish absorb it. When larger fish eat these small fish, the concentration of DDT increases. If a bird then eats several of these larger fish, the concentration of DDT in the bird will be even higher.

4. **Identifying the Source**:
- In the question, we need to determine what birds are feeding on that would result in the maximum concentration of DDT. The options provided are:
- A) Feces
- B) Meat
- C) Insects
- D) Seeds

5. **Analyzing the Options**:
- Feces: This is not a primary food source for birds.
- Meat: While birds can eat meat, the concentration of DDT would depend on what the meat source has consumed.
- Insects: Birds that feed on insects may have some level of DDT, but it is generally lower than that found in fish.
- Seeds: Seeds do not accumulate DDT as they are not part of the aquatic food chain.

6. **Conclusion**:
- The maximum concentration of DDT in birds is found when they feed on fish (which are higher in the food chain and have accumulated more DDT). Therefore, the correct answer is **B) Meat**, specifically referring to fish.

### Final Answer:
**Maximum DDT is present in birds feeding on fish (meat).**

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