Final answer:
The Earth's axial tilt and revolution around the Sun produce the seasons of the year, with variations in temperature and daylight experienced at different latitudes.
Step-by-step explanation:
The Earth's axial tilt of 23.5 degrees, along with its yearly revolution around the Sun, creates the seasons of the year. This axial tilt causes the Sun's rays to strike the Earth at different angles and intensities throughout the year. During the summer solstice, the Sun is higher in the sky and heats the Earth for a longer period, leading to warmer temperatures. Conversely, the winter solstice features the Sun low in the sky with a reduced heating effect. The vernal and autumnal equinoxes provide roughly equal day and night, signifying the transition between seasons.
Different latitudes experience varying intensities of seasons. Near the equator, the amount of daylight remains fairly constant, leading to uniform seasons often defined by wet and dry periods, while extreme latitudes see significant variations. Therefore, the correct answer is b seasons of the year, as the axial tilt and revolution cause the distinct seasonal changes.