Final answer:
The theme most related to the anthropology study would be Environmental Anthropology, considering the extensive focus on the relationship between humans and nature, modes of subsistence, and how economic practices affect and are affected by the environment.
Step-by-step explanation:
The theme from Africa that you are studying today could fall within various subfields of anthropology, depending on the specific focus of your curriculum or course. Considering the information you've provided on anthropology's engagement with the environment, economic practices, and societal issues, it seems that Environmental Anthropology is the most relevant theme to your studies. This field emphasizes the interdependence of humans and nature, examining the effects of human economic and social systems on their environments and vice versa.
Anthropologists take an in-depth look at how different societies understand and interact with their environments, which includes studying modes of subsistence such as gathering-hunting, pastoralism, cultivation, and industrialism. Each mode of subsistence involves particular relationships with the environment and has implications for social structure and cultural practices.
An important aspect of an anthropologist's work in the contemporary world is understanding how global issues like climate change, economic practices, and environmentalism are addressed. These themes are well captured in the field of Economic Anthropology, focusing on the cultural and historical features that shape economic behaviors in different settings and how these contribute to environmental understanding. Thus, Environmental Anthropology directly interfaces with social and economic life, making it a relevant and critical field of study in anthropology.