Question

Altitude of the sun varies at a place according to seasons

Answer 1

 because of the tilt of Earth's axis. During the summer the northern hemisphere is tilted toward the sun so it has summer and the southern hemisphere has winter, and during the winter it tilts the opposite way so the SH has summer and the NH has winter. This also makes the sun's altitude appear to change, as we move toward and away from it. The axis tilt is also responsible for the length of the days. 

Answer 2

ANSWER.....

This is because of the tilt of the Earth's axis. During the summer the northern hemisphere is tilted towards the sun so it has summer and southern Hemisphere has winter it, and during the winter it tilts the opposite way so the southern Hemisphere has summer and northern hemisphere has winter.This also make's the suns altitude appear to change,as we move towards and away from it.....

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