Why is the equator region the hottest part of Earth’s surface? The equator region is closest to the sun.

The primary reason the equatorial region is the hottest part of the Earth's surface is that **the sun shines directly on the equator region**. This direct sunlight means that the solar energy is more concentrated in this area, leading to higher temperatures.

In contrast, regions farther from the equator receive sunlight at a more oblique angle, which spreads the solar energy over a larger area and thus leads to cooler temperatures.

So, the correct understanding is that the direct sunlight received at the equator is the key factor in making it the hottest region of the Earth.