Step 1: Understanding Tsunami as a Natural Disaster:
A tsunami is a series of massive ocean waves caused by sudden displacement of water, usually triggered by submarine earthquakes, volcanic eruptions, or coastal landslides. Understanding disaster management terms is crucial for NCC cadets who assist during relief operations.
Step 2: Etymological Origin of the Word:
The term is derived directly from Japanese, structured from two distinct characters (Kanji):
• Tsu (津): Meaning “harbor.”
• Nami (波): Meaning “wave.”
Thus, tsunami literally translates to “harbor wave.”
Step 3: Why Japanese?
Japan is situated on the circum-Pacific seismic belt (commonly known as the “Pacific Ring of Fire”), where tectonic plates meet. Due to high frequency of undersea earthquakes, Japan has historically experienced many such oceanic surges, leading Japanese scientists to coin and popularize the term internationally. This corresponds to option (C).