Answer:
Hello, you didn't say what the task is, but I assume we have to choose the option that best describes the composition and the format of the excerpt from Douglas A Segar's <em>Introduction to the Ocean Sciences</em>. If so, I would choose D.
Explanation:
I chose D because the excerpt begins with the argument and continues with the conclusion, that is that "<em>terrestrial organisms are relatively easy to study</em>". Then, the study of terrestrial organisms are compared with the study of ocean life, that is not so easy due to its nature of being present "<em>throughout the depth of the ocean waters, and for several meters, or more, into the sediment.</em>" and it is not as easy to reach as the first one.
 
        
             
        
        
        
Answer:
Expository writing is writing that seeks to explain, illuminate or 'expose' (which is where the word 'expository' comes from)
Explanation:
 
        
                    
             
        
        
        
The correct answer is A) Also, the word ketchup has an interesting story.
<em>The most effective way to invert sentence 6 in order to vary sentence patterns is: "Also, the word ketchup has an interesting story."</em>
In grammar and editing, you have to vary the sentence pattern in order to not sound too monotonous. Reading the text or paragraphs should sound natural and with rhythm. So in the case of this passage, when you add the word "also" at the beginning of the sentence, it changes the style of writing and when the reader sees "also", they know that more or better information is coming. 
 
        
                    
             
        
        
        
8) D that’s the only one I know for sure. Have a good day