Answer:
D. from directly overhead.
Explanation:
The Sun rays reaches Earth's surface directly overhead at the equator. An equator is an imaginary line, that tends to divide the Northern hemisphere and Southern hemisphere equally, constituting the parallel of latitude 0 degree.
Since the Earth is tilted on its axis, the surface at the poles receives less of Sun rays and is cooler, and at the equator, the Solar energy strikes directly overhead making the area more warm than others.
Therefore, option D is correct.
