Here's why:

* Earth's Tilt: The Earth is tilted on its axis at approximately 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year.

* Equator's Position: The equator is an imaginary line that circles the Earth at 0 degrees latitude, directly in the middle. This means that the equator receives the sun's rays at a more perpendicular angle compared to other areas on the planet.

* Direct Sunlight: When the sun's rays hit the Earth at a more perpendicular angle, they are concentrated over a smaller area, leading to more intense sunlight and heat.

Note: While the equator receives the most direct sunlight overall, the specific location that receives the most direct sunlight at any given time will depend on the time of year and the Earth's position in its orbit around the sun.