They're not.
Earthquakes are caused by the Earth's tectonic plates moving and grinding against each other.
See the related question below.
Retrofitting is making older structures more resistant to earthquakes.
Earthquakes
Earthquakes
People have studied earthquakes from ancient times - today people who study earthquakes are Geologists specializing as seismologists.
earthquakes are deadly because they can kill alot of people
If you have ever felt an earthquake you will know they exist. Billions of people have felt earthquakes and many millions of people have been killed by earthquakes. Buildings collapse in many earthquakes. Earthquakes leave plenty of evidence and witnesses behind them that they happened.
Earthquakes strike without warning. Hurricanes are usually detected well in advance of making landfall.
Yes, earthquakes caused damage in the place where it happened. Many people may be killed for it.
Because earthquakes happen very often there.
There is an estimation of 830,000 people killed.
We do not know how to stop earthquakes or volcanic eruptions.
I would introduce earthquakes in a presentation by making poster that shows the layers of the earth including the plates. Along with the poster, I would explain how earthquakes are formed.