Concept:The northern hemisphere has shorter days when it tilts away from the sun, so the overhead sun must be in the southern hemisphere.
Explanation:The sun is overhead at the Tropic of Capricorn (
23.5∘S) around December 21.
At this time, the northern hemisphere is tilted away from the sun.
Sunlight strikes the northern hemisphere at a low angle, reducing daylight hours and making nights longer.
This event is called the winter solstice in the northern hemisphere.
When the sun is overhead at the Tropic of Cancer (
23.5∘N), the northern hemisphere tilts toward the sun and enjoys longer days with shorter nights.
When the sun is overhead at the Equator, day and night are nearly equal in both hemispheres.
The sun is never directly overhead at the Arctic Circle, so that option cannot be correct.
Answer:D. Tropic of Capricorn.