because they have many population and many other countries visited the singapore because of the environment, beautiful place and etc..
New York City and Chicago because for jobs there are lots of jobs that are available in those cities
They are narrower than the ones if the Atlantic and are not covered with thick layers of sediment.
A planet in motion remains in a stable orbit around the sun mainly because of two things: the nature of the gravitational force and because virtually no other forces act on the planet. The momentum of a planet changes during its orbit but not, in general, its inertia -- which relates solely to its mass.
