Final answer:
The fastest-growing segment of commerce-business is Internet commerce, driven by technological advancements and globalization which have transformed the marketplace and increased competition.
Step-by-step explanation:
The fastest-growing segment of commerce-business is Internet commerce. This growth is largely due to improvements in communication technologies and the global reach of the internet, enabling consumers to purchase goods from all over the world, leading to increased competition for local businesses. Similarly, in the B2B sector, business-to-business websites enable international connections between buyers and suppliers. This trend is also evident in industries like music and film, where products are increasingly produced digitally and made available via streaming or download, highlighting the transition to an information economy in the postindustrial era.