Answer:
Labor
Step-by-step explanation:
There are four factors of production that include land capital entrepreneurship and labor. They are the inputs in production. Labor involves the contribution of human beings by providing skills, time, and energy in output generation.
By employing young workers, Passerine is adding labor into the business. The young workers will acquire skills useful in the production process. They will spend their time and energy working for Passerine, who will compensate them by paying them wages.