Final answer:
Adam owns a business focused on web page design and maintenance, as indicated by his contract work with artisans on designing and maintaining websites.
Step-by-step explanation:
Adam owns a web page design and maintenance business. Considering the information provided, we can deduce that he is not running a restaurant, clothing boutique, or auto repair shop. The mention of his business being related to contracting with artisans for web page design indicates that he is specializing in creating and maintaining websites, which is a service often sought after by businesses and individuals looking to establish an online presence and enhance digital communications.