Which of the following is a requirement to employ an apprentice in a shop?

To employ an apprentice in a shop, one of the key requirements is that the owner must have a certain amount of professional experience in the cosmetology field. Specifically, having at least five years of experience ensures that the owner possesses sufficient skills and knowledge to effectively train and supervise an apprentice. This experience is crucial, as it allows the owner to provide quality education and mentorship, which are essential for the apprentice's development and success in the industry. Proper training under an experienced professional contributes significantly to maintaining high standards within the cosmetology profession, which aligns with the regulations set by the Pennsylvania State Board of Cosmetology.

The other options do not reflect the actual requirements for employing an apprentice. For example, being a college graduate or having a specific age requirement does not guarantee the necessary expertise needed to mentor someone in a practical setting. Similarly, holding a part-time job in a salon does not equate to having the extensive experience required to take on an apprentice.