Statement 1: Moon is a natural satellite of Earth.
Statement 2: Man-made satellites launched from Earth to orbit around it, are known as artificial satellites. But, moon is a naturally occuring celestial body, which revolves around Earth.
Both the statements are true and statement 2 is the correct explanation of statement 1.
Since Moon is a naturally occurring celestial body, which revolves around Earth, it is a natural satellite of Earth. The satellites which are sent from Earth by humans are called artificial satellites.