Given below are two statements : Statement I : Most of the hazardous landslides are induced by earthquakes. Statement II : All landslides involve falling of earth material under shear stress. In the light of the above statements, choose the correct answer from the options given below :
Statement I is false but Statement II is true
The question asks us to evaluate two statements related to landslides and determine the accuracy of each based on the options provided.
- Analyzing Statement I: "Most of the hazardous landslides are induced by earthquakes."
- While earthquakes can indeed trigger landslides, they are not the most common cause. Landslides can be caused by various factors such as rainfall, volcanic eruptions, river erosion, or anthropogenic activities like deforestation and construction. Therefore, stating that most hazardous landslides are induced by earthquakes is incorrect.
- Analyzing Statement II: "All landslides involve falling of earth material under shear stress."
- This statement is accurate. Landslides occur when there is a failure of the slope under the influence of shear stress, causing the displaced material to slide downwards. The movement can be a fall, slide, flow, or a combination of these, driven by gravity acting on weakened materials due to shear stress.
Now, let's evaluate the options:
- Option 1: Both statement I and Statement II are true – This option is incorrect because Statement I is false.
- Option 2: Both Statement I and Statement II are false – This option is incorrect because Statement II is true.
- Option 3: Statement I is true but Statement II is false – This option is incorrect; Statement I is false and Statement II is true.
- Option 4: Statement I is false but Statement II is true – This is the correct option. Statement I is false while Statement II is true.
In conclusion, based on the analysis, the correct answer is: Statement I is false but Statement II is true.
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