Final answer:
A skill is something that you have learned through practice and learning. It is different from an aptitude, which is a natural ability, and an attitude, which is a way of thinking or feeling.
Step-by-step explanation:
A skill is something that you have learned. The correct answer to the student's question is B. Skill. Skills are developed through practice and learning, enabling a person to perform tasks proficiently. In contrast, an aptitude is a natural ability or potential for learning, while an attitude refers to a settled way of thinking or feeling about something, which is typically reflected in a person's behavior.