It creates progress and civilization
I would go with:
A theme is best written as statement because a theme is main thing of a story, the author could also use a statement in a story to make it seem more alive or more real.
I Hope my answer worked for you :)
Since there is no underlined word, I will just list everything here.
A - there is no indirect object.
B - there is no predicate adjective.
C - assuming that the underlined word is the leaves, direct object would be the correct answer.
D - there is no predicate nominative in this sentence.