Because children and dogs are still filled with a natural hope and expectation that their smile will be returned. They tend to make direct eye contact with you, looking right into you, just grinning away (unless, of course, they have been abused).”
This is D, 'direct object'. Because you can ask the question used for direct objects - what- (I don't know - what? - why I said that).
Assuming the underlined word is "leader," the correct answer is predicate nominative. Predicate nominative refers to a word that is in the nominative case and completes a copulative verb. In this sentence, the word "leader." Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
The answers are:
A. It was a time of great prosperity.
D. It stressed the importance of manners.
E. It included established social rules and codes.
F. It emphasized the importance of appearances.