The transfer of energy from organism to organism in a natural community establishes

Options

A. Natural barriers
B. Biological control
C. Food chains
D. All the above

Answer

To solve the question regarding the transfer of energy from organism to organism in a natural community, we can break down the options provided and analyze them step by step.

### Step-by-Step Solution:

1. **Understanding the Options**:
- The options given are:
a) Natural barriers
b) Biological control
c) Food chains
d) All of the above

2. **Defining Natural Barriers**:
- Natural barriers refer to physical or biological factors that prevent organisms from interacting or transferring energy between each other. These barriers do not facilitate energy transfer; instead, they create separations in ecosystems.

**Hint**: Think about how physical barriers like mountains or rivers can affect the movement of species.

3. **Defining Biological Control**:
- Biological control involves the use of living organisms to control pest populations. While it is important for ecosystem balance, it does not directly refer to the transfer of energy between organisms in a food web.

**Hint**: Consider how biological control is more about managing populations rather than energy flow.

4. **Defining Food Chains**:
- Food chains illustrate the transfer of energy from one organism to another through consumption. In a food chain, producers (like plants) convert sunlight into energy, which is then passed on to herbivores and subsequently to carnivores. This is a direct representation of energy transfer within an ecosystem.

**Hint**: Visualize how energy flows from one trophic level to another in a food chain.

5. **Evaluating the Options**:
- Since natural barriers and biological control do not represent the transfer of energy, the only option that accurately describes this process is the food chain.

6. **Conclusion**:
- Therefore, the correct answer to the question is **c) Food chains**.

### Final Answer:
The transfer of energy from organism to organism in a natural community establishes **food chains**.