A central Idea In a text
is where

It is easy to identify a main idea that is directly expressed in the text. Main ideas are often found at the beginning of paragraphs. The first sentence often explains the subject being discussed in the passage. Main ideas are also found in the concluding sentences of a paragraph.

owen made and ideal hero because he had all the gret aspects of a good superhero

the correct answer can either be a or b because it could be both but you should probally choose b