The most important position that country's depend on migrants that the migrants should have job opportunities, so that they can bring their faily along as well.
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Explanation:
hydrogen, oxygen and fluorine
Advantage-extra work\data to compare first data with.
Disadvantage-Your data might change over time.
optical telescope (Hubble), X ray telescope ( Chandra) etc.
get around the Earth's atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying.
