Answer:
When the North Pole is tilted towards the Sun, the northern hemisphere experiences summer solstice. At this time, since the south Pole is tilted away from the Sun, the southern hemisphere experiences winter solstice. That is why, When it is summer in the northern hemisphere, it is winter in the southern hemisphere.
Step-by-step explanation:
When the North Pole is tilted towards the Sun, the northern hemisphere experiences summer solstice. At this time, since the south Pole is tilted away from the Sun, the southern hemisphere experiences winter solstice. That is why, When it is summer in the northern hemisphere, it is winter in the southern hemisphere.