The reason for the occurrence of summer and winter

The answer is: Earth's tilt during its orbit around the sun cause Seasons change.

The Earth's tilt as it revolves around the sun causes the seasons to change. In summer, parts of the Earth are tilted toward the sun, while in winter, parts of the Earth are tilted away from the sun. This change in tilt results from differences in sunlight, temperature, precipitation, and other weather-related factors that cause summer and winter to occur. The amount of sunlight reaching the Earth's surface also varies depending on the latitude of a region, which affects how hot or cold it gets during each season. For example, at high latitudes, temperatures are usually lower than those at lower latitudes. This is why summer is usually hotter in low latitudes than in high latitudes.

The Earth's tilt as it revolves around the sun is the main reason why summer and winter occur. As the Earth rotates, parts of it are exposed to more sunlight, resulting in warmer temperatures in those areas, while parts of it at a greater distance from the Sun are exposed to cooler temperatures. This is why summer occurs when the Earth is tilted toward the sun, and winter occurs when the Earth is tilted away from the sun.