Answer:
Objective Complement.
Step-by-step explanation:
Objective Complement can be defined as a word or a phrase that is used to renames the direct object or to tell of the state of the direct object. This word can be a noun, pronoun, or an adjective.
For example, Naina is a teacher. (In this sentence, teacher is an objective complement for the direct object 'Naina.')
In the given case, the word 'athlete' has been used to rename the direct object 'him.' The word 'athlete' has renamed 'him' as an 'athlete.'
Thus the correct answer is last option 'objective complement.'