The earth is spherical in shape. At any point of time when the earth faces the sun, its rays are more spread out at the poles than at the equator. Also the light rays have to travel farther through the atmosphere to reach the earth's surface. The poles thus receive slant rays having less intensity of heat. On the other hand, the equator receives direct light of high heat intensity as the rays travel straight and are least spread out on the earth's surface. This is why places near the equator are hotter than those near the poles.
Is there any other answer for the above question?