Question

what causes variation in the lenght of days and nights ? of class 6​

Answer 1

Answer:

The lengths of days and nights are not the same throughout the year. This variation is because of the inclination of the Earth's axis. ... This axis is not vertical but is inclined at an angle of 66.5 degrees with the plane of the Earth's orbit.

Answer 2

Answer:

it is due to the movement of Earth in His Axis. Because if Earth Face Towards The Sun Then it is day and the other side is at night