Final answer:
Medical sociology, environmental sociology, and environmental justice fall under the category of Applied sociology, focusing on practical applications to address societal issues.
Step-by-step explanation:
Medical sociology, environmental sociology, and environmental justice are examples of c) Applied sociology. They are specialized fields within sociology that focus on practical applications of sociological research to solve problems and improve society. Medical sociology involves the study of health and illness, the physician/patient relationship, healthcare systems, and how culture affects health. Environmental sociology looks at the interactions between humans and their environments, including how society impacts and responds to environmental issues. Lastly, environmental justice is concerned with the fair distribution of environmental benefits and burdens across different social groups.