Writing is a complex activity, and its components and subcomponents are one action. The number of levels. It is versatile and requires knowledge in different areas of skill and knowledge Edges that only make up writing  together. Many scientists’ studies reflect this Complexity and many areas have evolved at the same time-Psychology and Cognitive science, text linguistics and pragmatics, applied linguistics, and first and second Language training. Various aspects of current research on writing in a second language. They don't cover it extensive research in this area of writing, but useful as an example of  the depth and breadth of studying in that particular part of the field. They are presented here in context; discussion of current interests in writing research and their contributions is presented. Within the research area, that makes the most sense.