Question

The main idea can be known as all of the following EXCEPT
Answer
the theme
the central message or idea
the thesis
the topic

Answer 1

The thesis.

Answer 2

Hope it helped. :)

Answer 3

Theme! Not thesis. the thesis is generally the "answer" to the "big question". Making it the general idea. You state the thesis in your opening paragraph/introduction to help introduce what the paper or story is going to be about (MAIN IDEA) the THEME is a lesson you usually learn from the story.