Answer: Compensation
Step-by-step explanation:
Compensation is the type of defense mechanism in which a person tends to perform better or overachieve in a field to make up for the failure in the other field. This helps in normal functioning and to maintain neutrality
According to the situation mentioned in the question, client is compensating by concentrating on his studies so that he can maintain his performance in athletic and academic filed .He acquired the scholarship based on athletic fields rather than academic field.But to make up for the academic field ,he has to study so that he does not have to face failure.