<span>The submissive boy was so afraid to disagree, he often ate meals he hated and watched movies he had no interest in.
submissive = </span>ready to conform to the authority or will of others; meekly obedient or passive.
The complete predicate in this sentence is A. mopped his brow, exhaled sharply, and picked up his phone.
B and C aren't correct, because they aren't complete predicates - something is missing.
D isn't correct, because <em>looking up from his computer monitor </em>is not a predicate, it is an adverb phrase.
the conflict is very important because it develops the story