In the composition of a topic sentence or a thesis, the writer can employ the 5 Ws. For example, if the topic is National News Online, the writer may wish to explore in a thesis when this news is better than other sources, why this news is better than others, and how. or in what ways, it is better. Thus, the 5 Ws provide subtopics which will begin the body paragraphs in a thesis.
The five W's are used as guidelines. If you are writing a news story, in particular (although the information usually needs to be included in other types of writing), you can be certain that you have included all the important facts if you can reread your story and identify answers to each of those questions.
From a viewpoint of journalism, the "Five W's" are often used in the opening paragraphs of news stories, since by supplying this information, it gives the reader the most important facts at the top of the story.
*Originally these five Ws were used to investigate any crime in Detective fictions.(Most probably the idea originated in France).At present these five Ws are used in writing reports.In a good report the answers to these five Ws i,e who,which,what,when and where are expected.The structure should be inverse triangle.
* The second one is correct.
The purpose of the W's is to fully explain a situation, event or text cogently and efficiently in my opinion, and also to limit the amount of potential bias that can be used. The five W's are used in news features (journalism) and also when writing up historical sources and evidence.
As far as the first queston is cncerned, these w's are used to enhance reder's curiosity towards any written matterial. as it helps to arose different questions in their mind