Read the following passage carefully:
In his book, The Threads of Time, the author weaves a narrative that juxtaposes the lives of a modern-day architect and an ancient builder. The architect, Sarah, is driven by the need for sustainable designs, incorporating environmental elements, while the builder, Marcus, embodies traditional craftsmanship, drawing inspiration from nature and community. As the story unfolds, both characters face challenges: Sarah contemplates the ethics of her designs amidst rapid urbanization, while Marcus grapples with the decline of his traditional methods in a changing society. The narrative highlights not just their personal dilemmas, but also a broader commentary on the tension between innovation and tradition.
The author frequently employs metaphor to illustrate the characters' internal struggles. For instance, Sarah's projects are often compared to fragile ecosystems, suggesting that a misstep could disrupt the delicate balance of both nature and society. Conversely, Marcus's work is likened to aging trees, representing strength yet vulnerability in the face of inevitable change.