Why Do Cats Meow For No Reason?

Actually thats not true. Heres some examples.
1: Wants attention
2:wants food
3: WANTS TO BE LET GO IF YOUR HOLDING IT
4:scared
5:wants out or in a room
6:Wants you to pet it
7:is hurt
8:is mad
9:is sad?
10:Playing with another another cat
thats all I could think of

Cats always meow for a reason.. Weather it is because they are looking for another cat, or they are asking for something ei: Food, Litter to be changed, or just to play, no matter what, that cat is meowing for a reason, try and figure out what, and I bet she'll stop! Or she'll quickly figure out how to get you to pay attention to her and meow for your attention.. All the time.. Cats are smart.. Lol

Theres usually a reason. My cats cries when he's lonely, see's another cat, is hungry or just wants some attention.