When writers create an outline, they are most likely doing this to:
-decide which details to include
-organize ideas
-review details from the reading
-develop a thesis

I think it would be the 3 option

Explanation:

When you write an outline you take the time to use the information from whatever you read

the main character of "the secret life of walter mitty" retreats into a false pretense as a means escape from his mundane reality -- this is a flagrant issue seen in societies abroad, typically found in young adults and it is robbing our youths of their childhood.

explanation:

a thesis -- a well developed, formal thesis is required to be one sentence long. there are many themes in "the secret life of walter mitty" and i had resolved to give you one of the simpler ones while still honing it with class.