This is a Hellenistic work of Greek art. You can tell because not only is there movement in the sculpture, but it depicts a mundane, everyday activity that anyone can connect with. The emotional response on the boys face is also a characteristic of Hellenistic art. The look of concentration as he tries to detect the thorn and pluck it from his foot shows that Greek artists, and Greek society, was becoming increasingly interested in human emotion. They still idealized, and believed they were superior, but those in society commissioning these artworks cared less about stark, still, athletic bodies, and instead wanted to depict human emotion that was realistic and relatable at least to some extent. The difference between the body type of the classical Greek sculpture and the Hellenistic is slight, but if you look closely you can see that the sculpture of the boy from the Hellenistic period is less muscular than that of the classical Greek sculpture, meaning that while the Hellenistic sculpture is still balanced and displaying a very ideal body type, the need for showing off only athletes has become less important to the Greek culture.