Why are the temperatures on each of the other terrestrial planets more extreme than earth?

Other terrestrial planets have more extreme temperatures mainly because of their atmospheres

Explanation:

for example the atmosphere of Venus is composed mainly of carbon dioxide, this carbon dioxide traps the heat or energy from the sun and makes the planet have higher temperatures. where on mars the atmosphere is very thin so it takes in lots of heat and doesn't keep it in very well so it gets very hot and very cold