Why is detimirining the nose and ears hard for a sculptor?

Determining the nose and ears can be challenging for a sculptor because these features have complex shapes and subtle anatomical details that require careful observation and understanding of human proportions. The nose varies significantly in size and shape among individuals, while the ears are often asymmetrical, adding to the difficulty. Additionally, capturing the play of light and shadow on the curved surfaces of these features can be tricky, necessitating a keen eye for detail and a high level of skill in sculpting.