Concept:The Torrid Zone receives maximum heat because the sun's rays strike the Earth at a nearly perpendicular angle, making the mid-day sun exactly overhead for some part of the year.Explanation:The Torrid Zone lies between the Tropic of Cancer and the Tropic of Capricorn. Due to Earth's axial tilt, the sun is directly overhead at different latitudes within this zone throughout the year. When the sun is overhead at noon, the sunlight falls vertically on a small area. This concentrates solar energy, causing intense heating. In contrast, slanting rays (option A) spread over a larger area and travel through more atmosphere, reducing heat. Options B and C are incorrect—being landlocked or bounded by oceans does not directly cause maximum heat. The consistent overhead sun makes this zone the hottest on Earth.Answer:D. the mid-day sun is exactly overhead