What are the characteristics of tsunami.

Write the quadrants in which the following points lie:

$\left(-4,7\right)$

Tsunami is not related to earthquakes.

What are tsunamis? How are they caused? Where do they cause maximum damage?

Arti's class teacher has invited Jonathan to lecture the class on 'tsunamis'. Jonathan explains to the class that 'tsunami' is a Japanese word which literally means harbour waves. Since $1850$, tsunamis have been responsible for the loss of over $420,000$ lives worldwide. For example, the $26$ December, $2004$ tsunami killed about $188,000$ people. Predicting when and where the next tsunami will strike is currently impossible. Once the tsunami is generated, forecasting tsunami arrival and impact is possible through modelling and measurement technologies. In order to check the students' understanding, Jonathan asks the following question: 
Which of the following statements is/are correct? 
a. Tsunami is caused by earthquakes. 
b. Tsunami cannot be predicted because earthquakes cannot be predicted. 
c. Tsunami can damage areas lying far away from the coasts.

Seismic sea waves or tsunami are a series of enormous waves created by underwater disturbances such as volcanic eruption, earthquake, landslide or rarely by an asteroid or meteoroid. During the tsunami, waves travel outward in all directions from the area of origin. Once the wave approaches the shore, it builds in height. Movement of tectonic plates which make up the ocean floor often causes a tsunami. Tsunami, sometimes incorrectly called ‘tidal waves’, are not caused by the tides.
Tsunami warning system now exists in many places around the world. Many tsunamis could be detected before they hit land, and the loss of life could be minimised; with the use of modern technology such as seismographs and offshore buoys that can measure changes in wave heights and sirens to alert people on the beach.
Which of the following does not cause a tsunami?