During summer in the southern hemisphere, the northern hemisphere experiences

It means that when the earth is tilted towards the sun, then the northern hemisphere receives direct sun rays which are experienced by us as the summer season. During this time the southern hemisphere experiences the winter season. This phenomenon keeps alternating as the planet revolves around the sun.

The answer would be newton’s second law

Although this may be the opposite of what you think i will say it anyway. you were brought into this world for a reason and you still have soo much ahead of you. not everybody has an opportunity of living a great life, but it doesn’t give you a reason to end everything. somebody in the world loves you, and imagine what you would do to them if you left forever.