Answers

2014-06-16T13:20:57+05:30
Because for living human beings need air,oxygen,atmosphere, water, food, soil trees plants and these things are only available on Earth.
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2014-06-16T13:25:44+05:30
Because a human being needs its favourable climate where he or she can live they need air water and all the neccesity things for their livlihood and all those things are present in earth thats why .
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