- Light reflecting off of an object causes that object to be visible to the observer
- The moon reflects sunlight towards the earth
- A moon is a kind of celestial object / celestial body
- So, the moon reflecting sunlight towards the earth cause the moon to be visible to the observer

Hence, the moon reflecting sunlight towards the earth cause the moon to be visible to the observer
[Question]The Moon is visible to observers on Earth because of
[Context]- Light reflecting off of an object causes that object to be visible to the observer 
- The moon reflects sunlight towards the earth 
- A moon is a kind of celestial object / celestial body