The sun's rays shine at the most direct angle at the equator throughout the year.

Here's why:

* Earth's Tilt: The Earth is tilted on its axis, which causes different parts of the planet to receive varying amounts of sunlight throughout the year.

* Equator's Position: The equator is the imaginary line that circles the Earth at 0 degrees latitude, directly in the middle between the North and South Poles. This means that the equator is always positioned closest to the sun, resulting in the most direct sunlight.

Note: While the equator experiences the most direct sunlight overall, the sun's rays are not always perfectly vertical. The angle of the sun varies slightly throughout the year, depending on the Earth's position in its orbit.