Final answer:
Physical geography is the study of the natural phenomena in the environment. A geographer studying physical geography would be interested in the types of vegetation in the Brazilian rainforest, the frequency of earthquakes along the San Andreas Fault, and the annual average rainfall in Australia. They would not be as interested in the main languages spoken in sub-Saharan Africa, which falls under human geography.
Step-by-step explanation:
Physical geography is the spatial study of natural phenomena in the environment, such as rivers, mountains, landforms, weather, climate, soils, plants, and any other physical aspects of the earth's surface. A geographer studying physical geography would be interested in all of the following:
- The types of vegetation growing in the Brazilian rainforest: This falls under the study of biogeography, which examines the geographic patterns of species distribution.
- The frequency of earthquakes along the San Andreas Fault: This falls under the study of tectonic forces and the physical processes that cause their development.
- The annual average rainfall in Australia: This falls under the study of climatology, which focuses on climates and climate change.
Therefore, the correct answer is d. the main languages spoken in sub-Saharan Africa. This is more closely related to human geography, which explores human culture, social elements, and the size and distribution of settlements.