The most logical order for these sentences is D. 4, 1, 5, 2, 3.
Ordering sentences logically is important in order to build a coherent paragraph, that is, a paragraph that has unity and makes sense.<u> D) is the correct option because the paragraph must start with a presentation of the person that the text is going to talk about</u>, in this case, Dana Torres. Moreover,<u> the word 'trials', which has been used in the first sentence (4), is also used in the second one (1)</u>. This contributes to give coherence to the paragraph. Furthermore,<u> the third sentence (5) refers to 'that excellent performance' that has been mentioned in the previous sentence (1)</u>. In that way, option D) is the most logical order for these sentences.
1) It was quite necessary not only for Buck, but also for others struggling to survive in the wild North. If he hadn't killed Spitz it it could have been very dangerous for others because he was very aggressive due to the hunger. Even though he was the leader, blinded by hunger he could do anything to survive, forgetting about the rest of dogs.
2) If he hadn't died he could have get many other innocent lives, like he had done to Curley. This character yielded to the external conflict of the harsh wild conditions, and his instings were much more powerful than his sense of justice so he could have bring harm until he reached his own safety.
Magnifying Glass
Hope this helps!