Final answer:
Chatava is best described as a demographer, a professional who studies the statistical elements and dynamics of populations, such as age distributions and birth rates, and predicts future demographic changes.
Step-by-step explanation:
Chatava is a professional concerned with research on population figures, ages, and how these might change over time. She would best be described as a C. demographer. Demographers study the statistical elements of populations, including characteristics such as age and sex distributions, and population dynamics like births, deaths, and migration. This field crosses disciplines like sociology, economics, and geography, often using mathematical methods to project future population changes. Demographers employ various theories, such as Malthusian and demographic transition theories, to understand and predict population trends. These theories suggest that populations evolve along a predictable path as societies transition from pre-industrial to post-industrial stages. Assessing the health of world demographics is crucial for countries and international organizations to facilitate planning and resource management.