Which latitude at about 23.5 degrees north defines a boundary of the Torrid Zone?

The correct answer is Tropic of Cancer, which is located at approximately 23.5 degrees north latitude. This line is significant because it marks the northern boundary of the Torrid Zone, also known as the Tropics. The Torrid Zone is characterized by a hot climate with little seasonal temperature variation and encompasses the area between the Tropic of Cancer and the Tropic of Capricorn, which is situated at about 23.5 degrees south latitude.

Understanding the significance of the Tropic of Cancer helps to illustrate the Earth's climatic zones and how they are defined by latitude. The climate in the Torrid Zone is influenced by direct sunlight year-round, which contributes to its generally warm temperatures.

In contrast, the other options listed do not accurately represent the latitude that defines the boundary of the Torrid Zone. The Tropic of Leo and Tropic of Torrid are not recognized terms in geography, while the Tropic of Capricorn, located at 23.5 degrees south, marks the southern boundary of the Torrid Zone rather than the northern.