Choose the correct answer :
The average efficiency of energy transfer from herbivore to carnivore level is :

Options

A. `5%`
B. `10%`
C. `20%`
D. `30%`

Answer

To solve the question regarding the average efficiency of energy transfer from herbivores to carnivores, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Trophic Levels**: In an ecosystem, organisms are arranged in trophic levels based on their feeding relationships. Herbivores are primary consumers (Trophic Level 2), while carnivores are secondary consumers (Trophic Level 3).

2. **Energy Transfer Concept**: When energy is transferred from one trophic level to another, a significant amount of energy is lost, primarily as heat. This is a fundamental concept in ecology.

3. **Apply the 10% Rule**: The 10% rule of energy transfer states that, on average, only about 10% of the energy from one trophic level is transferred to the next level. This means that when herbivores (Trophic Level 2) consume plants (Trophic Level 1), only about 10% of the energy they obtain is available to the carnivores (Trophic Level 3) that consume them.

4. **Conclusion**: Therefore, the average efficiency of energy transfer from herbivores to carnivores is approximately 10%.

### Final Answer:
The average efficiency of energy transfer from herbivores to carnivores is **10%**.

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