Please answer #1 #2 #3 :)

quintessence, core, heart, crux, nucleus, substance, principle, fundamental quality, sum the origin of a word and the historical development of its meaning. insight, understanding, awareness, wisdom, education, learning, knowledge,

the image i have is the same for the question i am confused on the question tho

i don’t know the story but to answer the fiest question about theme and   subject . theme is a debatable opinion about a subject while the subject is a topic the author deside's to stick with and use through out the book and in his/her writing