Final answer:
The Indo-Australian Archipelago and East Indies refer to regions including modern-day Indonesia and the Philippines, as indicated by historical colonial connections and geographic positions.
Step-by-step explanation:
The regions referred to as the Indo-Australian Archipelago and East Indies specifically pertain to a group of islands and countries in the Southeast Asia and Oceania regions. Considering the provided information and the colonial history of the area, the correct answer to the question is option 4: Indonesia and Philippines. The term East Indies was historically associated with the colonial territories such as the Dutch East Indies, which now corresponds to modern-day Indonesia, while the Philippines is an archipelago that forms part of the Southeast Asian countries.The Indo-Australian Archipelago also spans a vast region of numerous islands situated between the Southeastern part of Asia and Australia. Countries such as Indonesia and the Philippines showcase a rich cultural and biological diversity, making them significant components in this archipelago.In conclusion, the term 'Indo-Australian Archipelago' and 'East Indies' historically refer to the regions that now include modern-day Indonesia and the Philippines, due to colonial-era nomenclature and their geographic location.