Why Do Different Seasons Occur on Earth?

Explanation:

Different seasons arise as the Earth revolves around the Sun because the Earth's axis is tilted. This tilt causes different parts of the Earth to receive varying amounts of sunlight at different times of the year, leading to the changing of seasons in each hemisphere.

When the Northern Hemisphere is tilted towards the Sun, it receives more direct sunlight, resulting in summer for that hemisphere. At the same time, the Southern Hemisphere is tilted away from the Sun, receiving less direct sunlight and experiencing winter.

Therefore, when the Northern Hemisphere is tilted towards the Sun, the Northern Hemisphere will be in summer, and the Southern Hemisphere will be in winter (option d).