It’s an answer based on what you think.
Can you elaborate? There really isn't a question here
In literature, a subject is a topic of the particular work.
What you are writing about in your work, is the subject.
Fear and worry reign when we lose our self confidence or become curious about ourselves. And when we start to ask questions like " Can I do it? " " Will I do it? " " Can I achieve it " and other negative thoughts. This is what happens when FEAR and WORRY reign.