Question
[106]. Passage: Coastal erosion is driven by sea-level rise, storms, sand mining and hard structures that interrupt sediment flow. A seawall may protect one beach while starving the next of sand, shifting the problem along the coast. Mangroves, dunes and beach nourishment work with natural processes, absorbing wave energy and trapping sediment, but they need space and time to function. Planning therefore requires shoreline mapping, limits on mining, and retreat or adaptation in the most exposed settlements, rather than a wall at every threatened point. What is the main idea of the passage?
Option 3 : Coastal protection should use mangroves, dunes and planned adaptation, since seawalls can shift erosion to neighbouring shores.
Detailed Solution
सही उत्तर Coastal protection should use mangroves, dunes and planned adaptation, since seawalls can shift erosion to neighbouring shores. है।
The main idea summarises the passage's overall argument and recommendation.
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prepsnap.in • Mock TestQuestion:
[106]. Passage: Coastal erosion is driven by sea-level rise, storms, sand mining and hard structures that interrupt sediment flow. A seawall may protect one beach while starving the next of sand, shifting the problem along the coast. Mangroves, dunes and beach nourishment work with natural processes, absorbing wave energy and trapping sediment, but they need space and time to function. Planning therefore requires shoreline mapping, limits on mining, and retreat or adaptation in the most exposed settlements, rather than a wall at every threatened point. What is the main idea of the passage?
Correct Answer: Coastal protection should use mangroves, dunes and planned adaptation, since seawalls can shift erosion to neighbouring shores.
The main idea summarises the passage's overall argument and recommendation.