The kingdom Protista includes

Options

A. Photosynthetic forms
B. Decomposers
C. Porotozoans
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Kingdom Protista**:
- The kingdom Protista is primarily composed of unicellular eukaryotic organisms. This means that Protista includes organisms that have a defined nucleus and are single-celled.

2. **Identifying Types of Organisms in Protista**:
- The organisms in this kingdom can be classified into different categories based on their nutritional modes. The main types include:
- **Photosynthetic Forms**: These organisms perform photosynthesis to produce their own food. They are autotrophic and contain chlorophyll. Examples include algae and diatoms.
- **Decomposers**: Some protists act as decomposers, feeding on dead or decayed organic matter. These organisms have a heterotrophic mode of nutrition. An example of this type is slime molds.
- **Protozoans**: This group consists of animal-like protists that are primarily found in aquatic environments. Protozoans can vary in shape; for example, amoeba has an irregular shape while paramecium has a more defined structure.

3. **Conclusion**:
- Based on the classifications above, it is clear that the kingdom Protista includes all of these types of organisms: photosynthetic forms, decomposers, and protozoans. Therefore, the correct answer is "all of these".

### Final Answer:
The kingdom Protista includes photosynthetic forms, decomposers, and protozoans, which makes the correct answer: **All of these**.

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