Hello. You did not enter the text to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
It is only possible to identify the quote you need, reading each quote, however, as you want a quote where Lena convinces Sammy that he is contributing to the family, we must consider that the correct answer is the quote where Lenna presents the good things that Sammy did for the family and how it has helped the family in different situations. You should look for the quote that looks something like this, to answer that question.
 
        
             
        
        
        
The best option would be using a variety of websites and articles to get your information so when the information matches others is most likely right
        
             
        
        
        
Answer:
A, B
Explanation:
While C and D are also important factors in giving a speech, they do not specifically help create a friendly and comfortable tone. 
 
        
                    
             
        
        
        
This part of the thesis would be considered the topic, more specifically it would be considered the <em>introduction of the topic to study</em> since the thesis revolves around, I assume, Isaac Newton and you are offering a brief 'summary' of his life and accomplishments. 
However if the reason to mention Sir Isaac Newton is to support an idea or a statement this could be considered a subtopic. It is subjective and directly related to the field of study you're doing the thesis for.
Hope this helps!
 
        
             
        
        
        
Answer:
Dear Friend, 
i found and saved a missing child today