Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

Options

A. heterotrophs
B. autotrophs
C. parasites
D. saprophytes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about organisms that prepare their own food using simple, naturally available raw materials.

2. **Identifying the Process**: The process through which these organisms prepare their food is known as photosynthesis. During photosynthesis, organisms convert carbon dioxide, water, and sunlight into food (glucose).

3. **Recognizing the Organisms**: The primary organisms that perform photosynthesis are plants. They utilize the raw materials available in nature to synthesize their own food.

4. **Defining the Term**: Organisms that can produce their own food are classified as autotrophs. Autotrophs are capable of synthesizing organic compounds from simple inorganic substances.

5. **Eliminating Incorrect Options**:
- Heterotrophs: These are organisms that cannot synthesize their own food and depend on other organisms for nutrition (e.g., humans).
- Parasites: These organisms live on or in a host and derive nutrients at the host's expense.
- Saprophytes: These organisms obtain their food from decaying organic matter.

6. **Conclusion**: Based on the definitions and processes discussed, the correct term for organisms that prepare food for themselves using simple, naturally available raw materials is **autotrophs**.

**Final Answer**: Autotrophs

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