Mercury Venus Earth Mars. Venus atmosphere is about 100 times as dense as Earth's.
Earth is distinctive because of water.
Mars has carbon dioxide atmosphere. Mars used to have water 3 to 4 billion years ago. But atmosphere evaporated so the planet cooled. In 1997 Pathfinder landed In the beginning Venus Earth Mars had thick water vapor and carbon dioxide atmosphere all similar. Venus was too hot to ever rain - leaving thick carbon dioxide causing sever greenhouse effect.