Final answer:
Due to the tilt of the Earth, one hemisphere receives more of the sun's direct rays.
Step-by-step explanation:
Due to the tilt of the Earth, one hemisphere receives more of the sun's direct rays. The Earth's tilt, which is about 23.5 degrees, causes the seasons and affects the amount of sunlight different regions receive throughout the year. During summer in the Northern Hemisphere, for example, the North Pole is tilted towards the sun, resulting in longer days and more direct sunlight.
Learn more about Effect of Earth's tilt on sunlight