Answer:
*taking a long journey 
*getting help from a powerful being 
*fighting a strong antagonist 
Step-by-step explanation:
According to the excerpt from "Perseus," the protagonist possesses characteristics of a Greek hero because he must set off a lengthy journey to find the proper supplies to attack a powerful antagonist like Medusa. First, he must look for the mighty nymphs, who will take him to the Gray Women. Thus, the latter will be able to guide them.