How is Earths tilted axis is responsible for seasons?

Answer 1

earths axis is responsible for seasons because if its tilted toward the sun then it would be summer in the northern hemisphere and winter in the southern now if it was tilted away from the sun then it would be winter in the northern hemisphere and summer in the Southern Hemisphere

Answer 2

The Earth is like a top - or a gyroscope - the axis always points the same way ... toward the north star.

As the Earth orbits the sun the axis sometimes points toward the sun (not directly, only 23 degrees from perpendicular) and sometimes (half a year later) away.

When the "north" pole points toward the sun, the northern hemisphere gets more radiation from the sun than the southern hemisphere - and vise-versa. Thus seasons.