Final answer:
The fetal position with extended legs toward the fetal shoulders is best described as the frank breech. In this position, the legs of the fetus are oriented upward.
Step-by-step explanation:
The fetal position with extended legs toward the fetal shoulders is best described as the frank breech. In a frank breech presentation, the legs of the fetus are oriented upward, with the buttocks being the presenting part during birth. This position is different from the complete breech, where both legs are crossed and oriented downward, and the footling breech, where one or both feet are the presenting part.