Seasonal changes refer to the variations in weather and daylight that occur throughout the year. These changes are primarily caused by the tilt of the Earth's axis as it orbits the Sun. As the Earth moves, different regions receive varying amounts of sunlight, leading to distinct seasons: spring, summer, autumn, and winter. Each season has unique characteristics. For example, spring often brings warmer temperatures and blooming flowers, while winter is typically cold with snow in many regions. These seasonal shifts affect ecosystems, agriculture, and human activities, influencing everything from plant growth to clothing choices.