Final answer:
The number of days the sun shines in the southern region depends on the latitude, with longer days at the Tropic of Capricorn and fewer days of sunshine closer to the Antarctic Circle.
Step-by-step explanation:
The number of days each year that the sun shines in the southern region depends on the latitude.
At the Tropic of Capricorn, which is at latitude 23° S, the sun passes through the zenith at noon, resulting in longer days with more sunshine. However, as we move closer to the Antarctic Circle, the number of days with sunshine decreases. In extreme cases, such as in the Arctic and Antarctic, there are periods where the sun does not rise at all or shines for 24 hours a day.