Why does earth have average moderate temperatures?

Earth has average moderate temperatures primarily due to its distance from the Sun, which allows for a balance between solar energy received and heat lost to space. The planet's atmosphere plays a crucial role in regulating temperature by trapping heat through the greenhouse effect, which maintains a stable climate. Additionally, the presence of oceans helps moderate temperatures by absorbing heat and distributing it around the globe. These factors combine to create a relatively stable and temperate environment suitable for life.