What is a line?

Everything is made up of and out of lines.There are many types of lines.depending on the width,texture,and direction they create many different types of feelings,and expressions.For example a curly line might represent happieness or a zig zag line might represent anger.There are five different basic and essentil kinds of lines they are virticle,horizintal,diagonal,zig zag,and curved.A line is a very important thing that we see every day but were not always gratful for them, when they're really important for so many reasons.