Explanation:

at Earth’s surfaces decreases as we move towards the poles. The insolation received at the surface varies from about 320 watts/m2 in the tropics to about 70 watts/m2 in the poles. Statement-II is correct: The Sun's rays make a smaller angle with the Earth's surface as latitude increases. The area that the vertical rays cover is always less than the area covered by slant rays. The energy is spread as more area is covered, resulting in a reduction in the net energy received per unit area. Additionally, because the slant rays must penetrate through a greater depth of the atmosphere, heat losses will be more due to absorption, scattering, and diffusion. Hence, with an increase in the angle of sun rays with respect to the Earth's surface, insolation increases.