What is the best-known artistic tradition of indigenous Polynesian inhabitants of Easter Island?

The best-known artistic tradition of indigenous Polynesian inhabitants of Easter Island is indeed stone sculptures. These sculptures are primarily represented by the iconic moai, which are monolithic statues that reflect the cultural and spiritual beliefs of the Rapa Nui people. The moai were carved from volcanic tuff and were intended to embody the ancestors' power, serving both as a means of honoring the dead and as symbols of authority.

In addition to the moai, Easter Island is known for its ahu, which are stone altars that often support these statues. The large-scale stonework of the island demonstrates the advanced technical skills and artistic vision of the Rapa Nui artisans. The prominence of stone sculptures in the culture also underscores the community's relationship with their environment and the importance placed on their ancestors, serving as a vivid expression of their identity.

While textile weaving, ceramic art, and wood carving are significant art forms in many indigenous cultures, they do not hold the same level of visibility and cultural significance on Easter Island as the stone sculptures do. Thus, the correct answer emphasizes the unique contribution of stone sculptures to the artistic heritage of the region.