The average energy transfer from one animal to another animal is (According to Lindeman's rule)

Options

A. 0.1
B. 0.2
C. 20% - 30%
D. 0.99

Answer

To solve the question regarding the average energy transfer from one animal to another according to Lindeman's rule, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Lindeman's Rule**: Lindeman's rule, also known as the 10% law, states that when energy is transferred from one trophic level to the next in an ecosystem, only a small fraction of the energy (approximately 10%) is passed on to the next level.

2. **Identify the Options**: The question provides four options regarding the average energy transfer:
- Option 1: 0.1
- Option 2: 0.2
- Option 3: 20 to 30%
- Option 4: 0.99

3. **Convert the 10% Rule to Decimal**: The 10% energy transfer can be expressed as a decimal. Since 10% is equivalent to 0.1 in decimal form, we can eliminate options that do not match this value.

4. **Evaluate the Options**:
- Option 1 (0.1) matches the 10% rule.
- Option 2 (0.2) is incorrect as it suggests a 20% transfer.
- Option 3 (20 to 30%) is incorrect as it suggests a higher percentage than the 10% rule.
- Option 4 (0.99) is incorrect as it suggests a 99% transfer.

5. **Conclusion**: Based on Lindeman's rule, the average energy transfer from one animal to another is 0.1 or 10%.

### Final Answer:
The average energy transfer from one animal to another animal according to Lindeman's rule is **0.1**.