Explain the reason why some trees in the coastal swamps have their roots emerged outward.

Explanation

**Step-by-Step Solution:**

1. **Understanding Coastal Swamps**: Coastal swamps are areas where the soil is often saturated with water and has high salt concentration. This environment is challenging for many plants due to the saline conditions.

2. **Soil Salinity and Aeration**: The high salt concentration in the soil leads to poor aeration. Aeration refers to the presence of oxygen in the soil, which is essential for root respiration. In saline soils, the lack of oxygen can hinder the plant's ability to breathe.

3. **Adaptation of Trees**: To cope with the low oxygen levels in saline soils, some trees have developed specialized structures. These structures are known as pneumatophores, which are roots that grow upward from the soil.

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