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 the 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 the earth, it is a natural satellite of earth. The satellites which are sent from earth by humans are called artificial satellites.