Final answer:
In ancient mythology, Medea would likely offer a potion or a magic spell to a childless man seeking her services to aid in fertility, reflecting her capabilities as a sorceress to alter natural events through potent magic. Hence, option (1) is correct.
Step-by-step explanation:
A childless man seeking Medea's services in the context of ancient literature and mythology would most likely be offered a potion or a spell to aid in fertility. Medea is known from Greco-Roman myths and historical texts as a sorceress who had the power to concoct potions and cast spells for various needs, including those related to fertility and childbirth. Among her magical services was the ability to intervene in matters of fertility and to provide solutions that sometimes defied natural laws.
Based on the context provided, it is likely that she would offer either a potion to make him fertile or a magic spell to grant him a child. Her reputation in the classical narratives for powerful and sometimes destructive magic, including the ability to alter the course of events dramatically, suggests that her typical offerings would go beyond mere advice or referrals to fertility specialists.