You are welcome.

The reason it's warm in the summer and cold in the winter has to do with the axial tilt (obliquity) of the Earth. The Earths axis is not exactly perpendicular to the ecliptic (the plane in which the Earth orbits the Sun) and is currently about 23.4°. This causes, depending on your latitude and time of the year, how long days are and the angle at which the sunlight hits the earth. During summer the days are longer and the angle the light hits the Earth is steeper. Seen from the Earths surface that means that the Sun rises higher during summer.

Because of the Earths axial tilt the season on the northern hemisphere and southern hemisphere are different. When the northern hemisphere faces towards the sun (summer) the southern hemisphere faces away from the sun (winter). The effect that the actual distance to the Sun has on the seasons is not very big and typically negligible.

A topic that's also related to your questions so far would be _"Axial precession"_. Let me know if you want to talk about that or if you have any other questions.
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