Is the question multiple choice?
People tend to concentrate on the coast for numerous reasons (ring of fire is a lot of coastline).
The correct answer is - aging population.
The aging population phenomena is becoming a big concern in the past few decades in some parts of the world. The most affected by this trend are the European countries, as well as Japan, the United States, Canada, Australia.
As the countries get more developed, and people earn more, it seems that they have much less children, usually one or two, and many people don't even have a child, and considering the upwards trajectory of the life expectancy, it results in an ever growing old population, and smaller and smaller young population.
This is a very dangerous trend on the long term as a nation may simply die out over time, as well as creating big economic issues.
Answer:
Convection currents
Explanation:
Convection currents are defined as the vertical movement of heat or moisture(energy) from one location to another primarily due to the temperature changes within the substance. Some of the examples of convection current may include boiling water, convection currents in the atmosphere and in the ocean, weather changes, campfires, etc. Thus, the air that moves in huge circular patterns as a result of temperature differences is known as convection currents.
Schools bring better knowledge among the society.Hospital improve health also contribute to the life expectancy period in a country.entertainment reduces the risk of creating crimes and also reduce the migration in the country.