If the date is december 21, at which placemark would the sun be directly overhead at noon?

If the date is december 21, sun be directly overhead at noon on the Tropic of Capricorn

Explanation:

The sun would be clearly overhead on the Tropic of Capricorn on December 21 around early evening. Tropic of Capricorn is 23.5 degrees south extension and this circumstance of the sun on it clearly overhead means the beginning of winter is in the northern side of the equator.

The ''Arctic Circle'' is arranged at 66.5 degrees scope north. On December 21, when the sun is overhead the Tropic of Capricorn, the Arctic Circle won't have the alternative to see the sun at all and subsequently witnesses a ''solidifying atmosphere'' from this time ahead.

answer at the divergent plate boundary in the middle of the ocean;