Question

which landforms are mangroves most effective at protecting?
coastlines, dunes, and deltas
coastlines, valleys, and dunes
deltas, dunes, and mountains
deltas, coastlines, and valleys

Explanation:

Mangroves are coastal ecosystems. They protect coastlines from erosion by stabilizing shorelines, dunes by reducing wind impact, and deltas by trapping sediment. Valleys and mountains are inland landforms not directly protected by mangroves.

Answer:

A. Coastlines, dunes, and deltas