If you're looking for a certain portion of this excerpt that restates the main idea, I would have to say that the first few words explain it very well: "<span>I demand that my books be judged with utmost severity..." The writer of this statement is saying that they wish for their books to only be judged by those who are educated in grammar and logic. </span>
The answer is D: the ratio of fat to other tissue in the body.
<span>Body composition refers to the measurement of fat, muscle, bone and water in relation to each other. Muscle takes up less room in the body than fat does, so five pounds of muscle will take up less room than five lbs of fat. Body composition offers a way at accessing the state of health or fitness without depending solely on the measurement of weight.</span>
The word, behind, tells you where or something is in relation to something else. It also has a symbol hat is ;-)
The cause-and-effect structure helps the reader understand how specific people's decisions affected the spread of the fire.