What causes the seasons on earth?
changes in the amount of energy produced in earth's core during different seasons.
the earth moving closer to and further from the sun as it orbits.
the tilt of the earth exposes different areas to direct sunlight as the earth orbits the sun.
the amount of sunlight blocked by the moon changes as the earth orbits the sun.

Tilt of earth on is axis. Option number 2

The tilt of the earth exposes different areas to direct sunlight as the earth orbits the Sun

Explanation:

The seasons are a result of the titled nature at an angle of 23.5 degrees from its plane and thus the earth and sun's inclination and the rotation on the axis of tilt cause the north and south variations but this effect remains negligible for the equatorial zone. when the north pole shifts to the sun it summers in the southern hemisphere and when the south pole faces the sun it is winter in the northern hemisphere. Hence we have winter solstice in December, autumn solstice in September and summer solicits in June and spring equinox n march.

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary. 

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