Being able to talk to another person.
<span>Dr. Lanyon receives a letter from Dr. Jekyll asking him for a favor. The favor <span>involved breaking and entering into Dr. Jekyll’s laboratory and giving some potions to a messenger who will arrive at Dr. Lanyon’s house at midnight.</span></span>
<span>For a theoretical physics journal, the tone that is most appropriate is B. a formal tone. </span>
The italicized part if the sentence (vice president) is the predicate noun. A predicate noun renames the subject and follows a linking verb.