Answer:
The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground. This simple concept is complicated by the curvature of the Earth's surface, which forces scale to vary across a map. Because of this variation, the concept of scale becomes meaningful in two distinct ways.
Explanation:
This area would be the tropics if that's what you're asking for If, not leave a comment below for what the question really is.
The places by the equator are hot because the sun's rays are by or directly on the equator.