Final answer:
The questioned era pertains to an important time in ballet when female dancers began to lead performances often portraying otherworldly characters like nymphs and fairies, symbolizing their rise in the arts against societal restrictions.
Step-by-step explanation:
The era in question is likely referring to a period in the history of ballet where there was a significant shift towards female dancers taking on lead roles, often as ethereal beings like nymphs and fairies. This change is part of ballet's performance evolution and reflects broader societal shifts in the portrayal and perception of women. Performances featuring female leads as supernatural characters can be seen as a metaphor for their emergence into more prominent artistic roles, while also challenging the constraints placed upon women’s portrayals in the arts.
Throughout the 1900s, the intersection between women's roles in art and ballet was marked by both their successes and the challenges they faced, as seen in the influence of the Surrealist movement, which often cast women into restrictive roles while some female artists subverted these images by portraying themselves as empowered mythical or historical figures. This era in ballet's performance history is not only significant for the arts but also for its socio-cultural implications.