Explain food chain with the help of one example .

Explanation

### Step-by-Step Solution:

1. **Definition of Food Chain**:
A food chain is a linear sequence that shows how energy and nutrients flow from one organism to another in an ecosystem. It illustrates the process of eating and being eaten, where one organism consumes another to gain energy.

2. **Energy Transfer**:
In a food chain, energy is transferred from one organism to another. When one organism eats another, it gains energy, but not all energy is transferred; some energy is lost in metabolic processes. Typically, only about 10% of the energy is passed on to the next level in the chain.

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