Because people live there. It's kind of recursive.
Always remember that there is a percentage of human behavior ... the exact percentage depends on how cynical you are ... for which "people are stupid" is an adequate explanation.
Mexico is atop several tectonic plates, and is crisscrossed on its western side by the Ring of Fire. This has resulted in one of the most geologically active regions on earth, with several volcanoes as a result.
They are deadly disasters killing many people
volcanoes and earthquakes
Earthquakes are a relatively common occurrence in Italy. Most of the time they do not indicate a catastrophic event is coming.
continental drift
Volcanoes are more dangerous due to the volcanic ash that can travel to the atmosphere and cause strange weather patterns and can even kill crops causing some people to starve
Earthquakes
Many of Mexico's people live in the valley's that are located between volcanoes because the soil that surrounds the volcanoes is rich and fertile, many farmers live in the valley despite the danger from volcanoes. The ash from volcanoes adds nutrients to the soil.
Because earthquakes and volcanoes are important, they can cause the death of dozens or even thousands of people.
they do nothing
by killing people
People can't do anything.
They are deadly disasters killing many people
volcanoes and earthquakes
Volcanoes are safer because they have warning signs and people can get away quicker and happen less often
Islands were volcanoes.
Earthquakes are a relatively common occurrence in Italy. Most of the time they do not indicate a catastrophic event is coming.
continental drift