What is the main reason that tropical regions near the Equator tend to experience relatively constant year-round temperatures?

The main reason that tropical regions near the Equator experience relatively constant year-round temperatures is primarily due to the angle at which sunlight hits these areas. The Equator receives direct sunlight throughout the year, which means that the intensity of sunlight remains fairly constant. This direct sunlight leads to a consistently warm climate, as the energy received does not vary much between seasons.

In contrast, higher latitudes experience more variation in sunlight angle, resulting in seasonal changes in temperature. While large bodies of water can influence local climates and elevation can affect temperature, these factors do not explain the consistent year-round temperatures as directly as the effect of sunlight angle does. Similarly, while it is true that there is minimal seasonal variation in daylight hours at the Equator, the pivotal factor influencing temperature stability remains the constant angle of sunlight throughout the year.