An advantage of using mind maps to learn English over using paragraphs
A mind map is like a picture with the main (most important) idea put at the center.
A paragraph is a block of texts with the main idea sometimes signaled by a topic sentence.
An advantage of using mind maps to learn English over using paragraphs is the clarity brought by visualizing the importance of ideas. Visualizing literally means "making visual" or putting texts or other things (not pictures) into pictures.
Compare the following paragraph with the mind map. Which is clearer if you take a look at each of them for the first time? 比較下面的段落和腦圖。倘若你第一次看以下的一段或一幅，這段文字還是這幅腦圖更為清晰？
Writing a good story is as challenging as drawing a good picture. A good story consists of many elements, including good description of characters and good narrative strategies.