i’m in economics please help

Answer:
b. unemployment
Explanation:
Unemployment refers to the situation where people within the working age group (15 to 64) are looking for work but cannot find one.
Underemployment is when a highly skilled labor is doing a work that is meant for a less skilled labor.
Cyclical Unemployment occurs when employers lay off workers as a result of economic recess.
Since the 15 year old wants a job but find one, he is unemployed.