Answers

2015-10-28T08:43:11+05:30
If the earth axis was vertical then 23.5 This tilt causes changes from season to season. 
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2015-10-28T10:32:16+05:30
Hi there,
the tilt is mainly responsible for the changing of seasons.when  the earth was vertical the entire system of seasons will be affected.
i hope this helps u..
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