Question

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wetlands that form along the mouths of streams and in areas with extensive deltas are
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Explanation:

Estuaries are coastal areas where freshwater from rivers and streams mixes with saltwater from the ocean. They often form along the mouths of streams and in areas with deltas. Deltas are landforms created by the deposition of sediment carried by a river as the flow velocity decreases upon entering standing water. Estuaries are influenced by tides and have unique ecological characteristics due to the mixing of freshwater and saltwater.

Answer:

Estuaries