The correct answer for this question would be the second option. Based on the given excerpt above  from Walden, the natural phenomenon that is referred to in this excerpt would be the food chain. Hope this is the answer that you are looking for. 
 
        
             
        
        
        
"Dies Irae", is a Latin word of the Hymn on the Last Judgment, ascribed to Thomas of Celano (d. c. 1256) and once forming part of the office for the dead and requiem mass.
This is part of the website I've found and I believe it'll help you out to find the era composition:   https://www.britannica.com/topic/Dies-irae
Hop this helps!
 
        
             
        
        
        
Answer:
Explanation:
The poem fused Christian and Pagan ideals to reflect on the time and place in which it was written. Brodeur, the author of an article states “a period in which the virtues of the heathen 'Heroic Age' were tempered by the gentleness of the new belief; an age warlike, yet Christian
 
        
             
        
        
        
Answer:
What does the hair symbolize?
Hair symbolizes physical strength and virility; the virtues and properties of a person are said to be concentrated in his hair and nails. It is a symbol of instinct, of female seduction and physical attraction.
What do clothes symbolize?
It's been long since clothes have become more than just practical things. Today, almost all over the world, clothes are a way of displaying one's individual identity and personality. Firstly, clothes used to protect us from climatic conditions, so basically they had nothing to do with style.