How does a delta form at the meeting place of sea and river water?

Explanation

### Step-by-Step Solution:

1. **Understanding the Composition of River Water and Sea Water**:
- River water contains colloidal particles, primarily clay, which are negatively charged.
- Sea water is rich in various electrolytes (such as sodium, chloride, magnesium, and calcium ions).

2. **Meeting of River Water and Sea Water**:
- When river water flows into the sea, these two bodies of water meet at a confluence.
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