Answer:
The correct answer is D. winter ... summer
If it is WINTER in the Northern Hemisphere, then it must be SUMMER in the Southern
Explanation:
There are different cycle processes on earth. One of them is the season cycle. Seasons are the result of the Earth´s movement of translation and the inclination of the Earth´s axis with respect to the plane of the orbit. The solar radiation reaches perpendicularilly the surface in different regions of the earth, during an annual cycle. This differential heatting produces the seasons. When it is winter in the northern hemisphere, it is summer in the southern hemisphere. When it is autumn in the northern hemisphere, it is spring in the southern hemisphere. And the exact opposite this occurs. Also, due to the shape of the orbit, summers are warmer in the southern hemisphere.
So, imagine the Earth as a circle. Now imagine that this circle is crossed by a longitudinal line (the earth axis). This axis points to the north pole and to the south pole. Now imagine that this axis is not exactly vertical, but it is inclined.
This circle (the earth) is in an orbit, which has an ovoid shape. This ovoid shape has two extremes, let us call them extreme A and B. Inside the orbit, there is the sun. But the sun is not in the middle. Instead, it is nearer to one of the arbit extremes, let us say it is closer to the B extreme.
During translation, the earth moves along the orbit receiving the sun´s radiation. When the earth is in the B extreme, it is closer to the sun and receives higher radiation. And due to the earth´s inclination, the southern hemisphere is getting much more radiation than the northern hemisphere. At this point, there is summer in the southern hemisphere and winter in the northern hemisphere. But when the earth is in the extreme A of the orbit, the north is getting more direct radiation from the sun. In this extreme, it is summer in the northern hemisphere and winter in the southern hemisphere.
Answer:
If it is winter in the Northern Hemisphere, then it must be Summer in the Southern Hemisphere.
