Final answer:
Biogeography is the study of living things' geographic distribution and the factors that affect it. A naturalist studying morphological patterns shared between species in rainforests on different continents represents an example of biogeography. The option (A) is correct.
Step-by-step explanation:
Biogeography is the study of the geographic distribution of living things and the abiotic factors that affect their distribution. It examines how different species are distributed across different regions and continents, and how environmental factors such as temperature and precipitation influence these patterns.
In the case of the naturalist studying morphological patterns in temperate rainforests on different continents, this would be an example of biogeography. The naturalist would be analyzing the similarities and differences in morphological patterns between species in these two distinct habitats. Therefore, option (A) is correct.