Final answer:
Technology advancement, globalization, increased foreign investments, and trade liberalization are central to the internationalization of services, enabling the expansion of services across borders and making global operations easier for companies.
Step-by-step explanation:
The central elements in the internationalization of services include technology advancement, globalization, an increase in foreign investments, and trade liberalization. These factors have facilitated the expansion of services across borders, making it easier for companies to operate on a global scale. Technology advancements, particularly in computing and telecommunications, have lowered the costs of managing long-distance economic connections. Globalization has increased cultural and economic interactions and made the world more interdependent. Foreign investments are a crucial aspect as companies often invest in other countries to either enter or expand their market reach. Trade liberalization, including international agreements and treaties, has encouraged the reduction of trade barriers and has consequently spurred greater international trade in services.