Final answer:
Camille Dungy's work addresses environmental issues, focusing on the relationship between humans and nature, and often aligns with themes of modern environmentalism.
Step-by-step explanation:
The topic of the writing on the wall in Camille Dungy's work is B. Environmental issues. Camille Dungy's literature often explores the complex interplay between the human and natural worlds, touching on themes of environmentalism, natural history, and the place of humans in the environment. Her work prompts readers to consider the symbiotic and sometimes adversarial relationships we have with nature. Dungy's characters and narrators express ideas and opinions that reveal cultural, social, or political values, many of which overlap with modern environmental concerns such as conservationism and environmental justice.
Artists and writers, throughout history, have used their work to communicate on various issues. Be it through poetry, novels, music, or visual arts, these modes of expression have been powerful tools for instigating dialogue and advocating for change regarding social justice, political activism, and cultural challenges. This is clearly demonstrated in the historical role of muckrakers, whose writings exposed the institutional failings and inequities of their time, as with Ida Tarbell's critique of Standard Oil's business practices.