Themes are difficult to identify because

there is room for interpretation

the author hides them

they are not usually present in short stories

no one can agree on what they are

The correct answer is "there is room for interpretation."

Explanation:

Themes are difficult to identify because there is room for interpretation.

A theme is basically an idea around which a story revolves. Authors never really explicitly state the theme of their stories. It is difficult to identify the theme, specifically if the story has more than one themes. They can be easily misinterpreted. The content of the theme is usually repressed and the nature of its expression is complicated.