Which of the following diagrams represents the winter in the southern hemisphere?

This motion lasts approximately 365 days (one year). Since the axis of rotation of the Earth is tilted (by about 23 degrees from the vertical), the amount of light received by different parts of the Earth at the different part of the year is different.

In fact, we observe 4 "extreme" cases:

- Situation at the bottom: here the situation is symmetrical in the two hemispheres, which receive an equal amount of light. So, we have 12 hours of daylight and 12 hours of dark at every point on Earth - this is called equinox, and it occurs in September

- Situation on the right: here we see that the Southern Hemisphere receive much more light than the Northern Hemisphere - so the Southern Hemisphere has more hours of sunlight per day. This is called winter solstice, and it occurs in December - in this case, it is summer in the Southern Hemisphere and winter in the Northern Hemisphere

- Situation at the top: here the situation is symmetrical in the two hemispheres, which receive an equal amount of light. So, we have 12 hours of daylight and 12 hours of dark at every point on Earth - this is called equinox, and it occurs in March

- Situation on the left: here we see that the Northern Hemisphere receive much more light than the Southern Hemisphere - so the Northern Hemisphere has more hours of sunlight per day. This is called summer solstice, and it occurs in June - in this case, it is summer in the Northern Hemisphere and winter in the Southern Hemisphere