Answer:
the benefit to his grades from studying for an hour
Explanation:
Opportunity cost also known as the alternative forgone, can be defined as the value, profit or benefits given up by an individual or organization in order to choose or acquire something deemed significant at the time.
Simply stated, it is the cost of not enjoying the benefits, profits or value associated with the alternative forgone or best alternative choice available.
In this scenario, Gomer decided to spend an hour playing basketball rather than studying his books. Thus, his opportunity cost is the benefit to his grades from studying for an hour.
This ultimately implies that, if he had spend the time he used in playing basketball to study, it would have added value to his grades.
