Q. Assertion (A): Tsunamis are caused by sudden displacement of the ocean floor due to earthquakes, volcanic eruptions, or other underwater disturbances.
Reason (R): The wavelength and speed of tsunami waves primarily depend on the ocean depth, and their amplitude increases near the coast due to shoaling.
Select the correct option:

[A] Both A and R are true, and R is the correct explanation of A.

[B] Both A and R are true, but R is not the correct explanation of A.

[C] A is true, but R is false.

[D] A is false, but R is true.

Answer: A
Notes:

Explanation:

  • The assertion correctly states the causes of tsunamis—sudden ocean floor displacement due to earthquakes, volcanic eruptions, etc.
  • The reason correctly explains that tsunami wave speed and wavelength depend on ocean depth, and the wave amplitude increases near the coast due to shoaling, which explains the behavior and impact of tsunamis near shorelines.

Source- IE

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