Define stratification.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Concept**: Begin by recognizing that stratification refers to the organization of different components within an ecosystem.

2. **Defining Stratification**: Stratification is defined as the arrangement of plants and animals in an ecosystem into different levels or layers.

3. **Vertical Layers**: Emphasize that these layers are vertical, meaning that the plants and animals are distributed at various heights above the ground.

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