________ non-green plants. They cannot synthesize their own food. They depend for their food on others.

Options

A. Fungi
B. Protozoa
C. Bacteria
D. Algae

Answer

To answer the question, we need to identify the type of non-green plants that cannot synthesize their own food and depend on others for their nutrition.

### Step-by-Step Solution:

1. **Understanding the Question**: The question states that we are looking for non-green plants that cannot synthesize their own food and rely on other organisms for their nutrition.

2. **Identifying Non-Green Plants**: Non-green plants are those that do not contain chlorophyll, which is necessary for photosynthesis. This means they cannot produce their own food through the process of photosynthesis.

3. **Options Analysis**: We have four options to consider:
- Option 1: Fungi
- Option 2: Protozoa
- Option 3: Bacteria
- Option 4: Algae

4. **Evaluating Each Option**:
- **Fungi**: Fungi are non-green organisms that do not perform photosynthesis. They obtain nutrients through absorption from their environment, often from decaying organic matter. They are classified as non-green plants.
- **Protozoa**: Protozoa are single-celled organisms and are not classified as plants. They can be either autotrophic or heterotrophic.
- **Bacteria**: Bacteria are prokaryotic organisms and can be autotrophic or heterotrophic, but they are not classified as plants.
- **Algae**: Algae are generally green and contain chlorophyll, allowing them to photosynthesize.

5. **Conclusion**: Based on the analysis, the only option that fits the criteria of being a non-green plant that cannot synthesize its own food is **Fungi**.

### Final Answer:
**Fungi** are non-green plants. They cannot synthesize their own food and depend on others for their nutrition.