i think that the answer is the sun but if that is not right i hope i was close.
no !
earth is hot and cold
The earth is protected by its atmosphere.
Earth maintains a relatively stable temperature due to the greenhouse effect, where gases in the atmosphere trap heat from the sun. This helps regulate the planet's temperature by retaining some of the heat. Additionally, Earth's distance from the sun and its angle of tilt also play a role in preventing extreme hot or cold temperatures.
It keeps you from getting cold. You can die from being too cold, but you can die from being too hot also. Humans are frail.
It's sort of like a hot tub that's warm rather than hot. It keeps the divers from getting cold to quickly after their dives.
Hot
Deserts are dry, no matter hot or cold. It is the lack of water that keeps population low.
You can find a travel cooler and warmer that keeps things both hot and cold at amazon.com, www.crateandbarrel.com, www.keepyourcooler.com, and sears.com.
The temperatures on earth are very cold and very hot
hot
The Earth is both hot and cold (depending on what state your in). You sould know because if your reading this you most likely on planet Earth.