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.
Social, cultural and economic factors influence fertility, mortality and migration rates. Migration is affected by various factors like age, sex, marital status, education, occupation, employment etc. Age and sex are main demographic factors that affect the migration.
Answer: show what's happening to are earth
Explanation:
I would choose the windmills for production of electric power.
The modern day windmills are relatively good producers of electric energy. They are not very expensive, they use renewable energy (the wind), and are of great use for both the economy and the people themselves.
The economic benefit can be seen that they produce energy very cheaply, and they do not require and resources for their functioning. Also, they save a lot of money because they manage to produce electricity that otherwise would have been imported, thus hitting the economy badly.
The benefit for the people is that they provide more electricity, stable one, and prevent the lack of electricity when it is used more, especially in the winter months. Also, this electricity is cheaper.
