One of the following is the bio-pesticide

Options

A. Heptachlor
B. Bacillus thuringiensis
C. Acetobacter
D. Thermophilus aquaticus

Answer

To determine which of the given options is a bio-pesticide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Bio-pesticides**:
- Bio-pesticides are derived from natural materials such as animals, plants, bacteria, and certain minerals. They are typically less harmful to the environment compared to conventional pesticides.

2. **Analyze the Options**:
- **Option A: Heptachlor**:
- Heptachlor is a synthetic pesticide, not derived from living organisms. Therefore, it does not qualify as a bio-pesticide.

- **Option B: Bacillus thuringiensis**:
- Bacillus thuringiensis (often abbreviated as Bt) is a bacterium that is used as a bio-pesticide. It produces toxins that can kill certain insects when they ingest it. This makes it a suitable candidate for bio-pesticide.

- **Option C: Acetobacter**:
- Acetobacter is a genus of bacteria that is not used as a bio-pesticide. It is primarily known for its role in vinegar production and does not have insecticidal properties.

- **Option D: Thermus aquaticus**:
- Thermus aquaticus is a bacterium used in molecular biology, particularly in the PCR (Polymerase Chain Reaction) technique. It is not a bio-pesticide.

3. **Conclusion**:
- Among the options provided, **Bacillus thuringiensis** is the only organism that qualifies as a bio-pesticide.

### Final Answer:
**Bacillus thuringiensis** is the bio-pesticide among the options given.

---