According to R.H. Whittaker in which kingdom included producer, decomposer and consumer:-

Options

A. Plantae
B. Fungi
C. Protista
D. Animalia

Answer

**Step-by-Step Solution:**

1. **Understanding R.H. Whittaker's Classification**: R.H. Whittaker proposed a five-kingdom classification system for living organisms. The five kingdoms are Monera, Protista, Fungi, Plantae, and Animalia.

2. **Identifying Producers, Decomposers, and Consumers**:
- **Producers**: These are organisms that can produce their own food through photosynthesis or chemosynthesis. Examples include plants and certain unicellular algae like Chlamydomonas.
- **Decomposers**: These organisms break down dead and decaying matter into simpler organic molecules. They include heterotrophic bacteria found in Monera, slime molds in Protista, and fungi.
- **Consumers**: These organisms consume food made by others. This includes animals and some protozoans in Protista, such as amoeba and paramecium.

3. **Locating the Kingdom**:
- Producers are found in Plantae and some in Protista.
- Decomposers are primarily in Monera, Fungi, and Protista.
- Consumers are found in Animalia and some in Protista.

4. **Conclusion**: The kingdom that includes all three types of organisms (producers, decomposers, and consumers) is **Protista**. This kingdom consists of unicellular eukaryotic organisms that can exhibit all three nutritional modes.

**Final Answer**: According to R.H. Whittaker, the kingdom that includes producers, decomposers, and consumers is **Protista**.

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