The object which follows the transitive verb is the direct object. It can be in the form of pronouns, nouns, clauses or phrases.
A formula which can be utilized to identify the direct object is
Subject + verb+ what? or who?= direct object.
Therefore, the sentence which uses the word 'selection' as a direct object is " The U.S, however, must approve the president's selection."
Wherein the direct object is "President's selection."
