In the texts, the narrators have issues with their self-identity as they sense imperceptible and do not sense they are distinct from different people. Nevertheless, while in the "Secrets of the Cicada Summer" the author only sees herself as imperceptible, in "Bloomability" the writer is wondering if she prefers to be hidden.
The answer to the first is B. Appositive position, because it is separated with commas. The answer to the second is C. predicate position, because Frustrating is a participle that combines with is to create a predicate.
I believe it would be a persuasive speech. You want to convince the audience that they should recycle.
Hope this helps!
Let me know if i'm wrong