Spoken word and written text are different because?

There are several differences between spoken words and written texts, among these differences are the following:
1- Spoken words have tones that show the feelings of the speaker, whereas, the written text is expressionless.
2- Spoken works might have inaccurate grammar or sentence structure, whereas, the written text has correct syntax and perfect grammar
3- Written text has a sort of a standard form that can be understood by anyone who speaks the language that the text is written in, regardless the dialect or the accent.

There is a little paper clip at the bottom of your screen and then you click then you pick the picture you want