20 !
"ode to nightingale"
why might it be important for the speaker that the nightingale has "never known" about these aspects of human life?

I have not read this passage, but one can infer the importance of such works.  To have never known these aspects of human life, is to experience it all for the first time.  When one has a first time experience, there is usually mixed emotions, so the speaker may feel this is important for the expression of these feelings.  For example, if you have never been to a theme park before, what might you be feeling when you go for the first time?  Excited? Scared? Overwhelmed?  Thus, how is the nightingale feeling about these aspects of human life?  This is important for reflection and description purposes.

the correct answer is:   [d]:   " diagram "   .

hope this !

    best wishes to you!

sentences vary by structure as well as by function. there are compound, complex, and compound-complex sentences.

simple sentence

i like to read.

a simple sentence has one independent clause.

compound sentence

i like to read, and i also like to write.

a compound sentence includes more than one independent clause, connected by a coordinating conjunction (and, but, for, nor, or, so, or yet).

complex sentence

i prefer to read books that are bestsellers.

a complex sentence includes one independent clause and one or more dependent clauses. (a dependent clause is one that cannot stand alone.) types of dependent clauses include relative clauses (i kicked the boy who pinched me), adverb clauses (i am going home now because i have a curfew), and noun clauses (i don't know what to do next).

compound-complex sentence

although i prefer to read current bestsellers, i do like to read old agatha christie mysteries, and i also like some 20th-century science fiction.

compound-complex sentences take a bunch of clauses (multiple independent clauses, and one or more dependent clauses) and toss them together like a salad. although these sentences take practice to write in a grammatically correct fashion, they can hold a tremendous amount of meaning, and are common in academic writing.