Dubhe is located at which position in the Big Dipper?

Dubhe is identified as the second brightest star in the constellation Ursa Major, which contains the Big Dipper asterism. In the context of the Big Dipper, Dubhe is positioned at the top of the 'bowl' or 'basket' of the Dipper, specifically marking the top nebula or the far left star when considering its traditional depiction in the night sky. This stellar position helps observers locate other stars and constellations, and Dubhe is crucial as it serves as a pointer star towards Polaris, the North Star.

Understanding the layout of the Big Dipper is essential for recognizing how stars are grouped within different constellations, and Dubhe's role at the top illustrates its importance as a reference point in celestial navigation. The other choices refer to different parts of the Dipper that do not accurately denote Dubhe's placement in the asterism.