What latitude marks the boundary of the Torrid Zone at approximately 23.5 degrees south?

The latitude that marks the boundary of the Torrid Zone at approximately 23.5 degrees south is known as the Tropic of Capricorn. This imaginary line, located in the Southern Hemisphere, identifies the southernmost point where the sun can be directly overhead at noon during the summer solstice, which occurs around December 21. The Torrid Zone, or Tropics, is characterized by consistently warm temperatures and minimal seasonal variation in climate.

This zone extends between the Tropic of Cancer at approximately 23.5 degrees north and the Tropic of Capricorn. The other options, while related to topics of latitude and geography, do not accurately define the southern boundary of the Torrid Zone. For instance, the Tropic of Cancer is found in the Northern Hemisphere, while the names like Tropic of Torrid and Tropic of Leo do not correspond to recognized geographic boundaries. Thus, the identification of the Tropic of Capricorn as the southern boundary of the Torrid Zone is indeed correct.