Torrid Zone on Earth receives maximum heat as:

Concept

The amount of solar heat a place receives depends on the angle at which the sun's rays strike the surface (the angle of incidence), not on land-ocean distribution. When rays fall vertically (the sun directly overhead), the same amount of solar energy is concentrated over a smaller surface area and travels a shorter path through the atmosphere, so more heat reaches the ground. When rays fall obliquely (slanting), the same energy spreads over a larger area and passes through a longer atmospheric path, so less heat reaches the ground.

Application

Earth's axis is tilted at 23.5°, so the sun's vertical rays fall only within the belt between the Tropic of Cancer (23.5°N) and the Tropic of Capricorn (23.5°S) at some time during the year - this belt is the Torrid Zone. Because the mid-day sun is exactly overhead here, incoming solar radiation is concentrated (vertical incidence, shortest atmospheric path), which is why the Torrid Zone receives the maximum heat of any latitudinal zone on Earth.

Cross-check

Compare with the Temperate and Frigid Zones, where the sun's rays always fall obliquely and never reach directly overhead - by the same angle-of-incidence rule, these zones receive progressively less heat, confirming that overhead vertical incidence (not coastal/continental position) is what drives maximum heating in the Torrid Zone.