In Whittaker's classification, which kingdom is main producer ?

Options

A. Monera
B. Protista
C. Plantae
D. Mycota

Answer

### Step-by-Step Solution:

1. **Understanding Whittaker's Classification**:
- Whittaker proposed a five-kingdom classification system which includes Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, and Kingdom Animalia.

2. **Identifying the Main Producers**:
- In biological terms, "producers" refer to organisms that can produce their own food, typically through photosynthesis. This is primarily associated with plants.

3. **Examining Each Kingdom**:
- **Kingdom Monera**: Consists of prokaryotic organisms (bacteria) which are not typically producers.
- **Kingdom Protista**: Includes simple eukaryotic organisms, some of which can photosynthesize (like algae) and are considered producers.
- **Kingdom Fungi**: These are decomposers and do not produce their own food.
- **Kingdom Plantae**: This kingdom is primarily composed of multicellular plants that are the main producers in ecosystems.
- **Kingdom Animalia**: These organisms are consumers and do not produce their own food.

4. **Conclusion**:
- Based on the classification, the main producers are found in **Kingdom Plantae**, as they are the primary photosynthetic organisms.

### Final Answer:
- The main producer in Whittaker's classification is **Kingdom Plantae**.