The Sun is higher in the sky and and provides more hours of daylight in June.
The correct answer is D. The angle at which the Suns light strikes Earth affects the temperature--the Suns energy is more concentrated when the Sun is high in the sky. Weather is also warmer in summer because the Sun, being higher, provides more hours of light as it travels a greater distance across the sky. This longer exposure to sunlight gives the land, seas, and air masses more time to warm during the day.
When the Sun reaches high in the sky and its rays of light (and heat) strike the ground nearly perpendicular to the ground we have summer. When the Sun at noon is low in the sky, its rays hit the ground at a more glancing angle, resulting in the warming action of these rays being spread out more; any one spot receives less heat. We then have winter.*##**##*