Flow of energy in an ecosystem is always

Options

A. unidirectional
B. bidirectional
C. multidirectional
D. no specific direction

Explanation

**Step-by-Step Solution:**

1. **Understanding Energy Flow in Ecosystems**: In an ecosystem, energy is transferred from one organism to another through food chains. This transfer is essential for the survival of organisms.

2. **Identifying the Direction of Energy Flow**: When we consider a simple food chain, such as grass → goat → lion, we can observe how energy flows from one organism to another. The grass (producer) is eaten by the goat (primary consumer), and then the goat is eaten by the lion (secondary consumer).

3. **Analyzing the Flow of Energy**:
- The grass captures energy from the sun through photosynthesis.
- The goat consumes the grass and obtains the energy stored in it.
- The lion then consumes the goat, obtaining the energy that the goat acquired from the grass.

4. **Conclusion on Energy Flow Direction**: The energy flow in this example is one-way. It starts from the grass and moves to the goat, and then to the lion. There is no reverse flow of energy; the goat does not eat the lion, and thus, energy does not flow back to the grass.

5. **Final Answer**: Therefore, the flow of energy in an ecosystem is always **unidirectional**.

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