Final answer:
The Nemean Games likely featured at least three age categories for athletes: boys, youths, and men, which correspond to pre-pubescent individuals, young adults, and full-grown adults, respectively.
Step-by-step explanation:
The Nemean Games were one of the prestigious athletic competitions in ancient Greece, alongside other festivals such as those held at Olympia and Delphi.
Although the question at hand does not directly provide information regarding the age categories of the Nemean Games, by examining similar ancient Greek athletic competitions, we can deduce that there were likely different age divisions for competitors.
Typically, ancient Greek games had at least three age categories which, based on historical evidence from events like the Olympics, may have been: boys, youths, and men.
Boys were typically those who had not reached puberty, youths were young men who had become adults, and the men's category was for full-grown adult males. Therefore, it is reasonable to surmise that the Nemean Games observed a similar classification.