Which biotic component is involved in maintaining soil fertility ?

Explanation

### Step-by-Step Solution:

1. **Understanding Biotic Components**: Biotic components of an ecosystem are categorized into three main types: autotrophs (producers), heterotrophs (consumers), and decomposers (detritivores).

2. **Role of Decomposers**: Among these, decomposers play a crucial role in maintaining soil fertility. They break down dead organic matter, which includes leaves, twigs, and other organic debris.

3. **Process of Decomposition**:
- **Fragmentation**: The first step in the decomposition process is fragmentation, where large organic materials are broken down into smaller pieces.
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