Body language can be defined as the series of gestures and movements we make with our face, head, arms and indeed our whole bodies, to signal thoughts and feelings. Our body language can say a lot about how we feel.
Generally, persons are identified by their size and shape. Especially strangers when we meet we note their size and shape, say whether they are tall or short, fat or thin. Usually people like taller persons.
You might have visited museums, exhibitions etc. There you see a board where usually written as below. You may look at these paintings (or any object) from a distance but you are not allowed to touch. Beauty to see, not to touch.
It is an empty area or place which can be filled up by something or by person. The way we occupy space is vitally important. Space decides many things. As regards body language, the study of our use of space is of greater importance.