Which of the following is a characteristic of API-led connectivity architecture?

API-led connectivity architecture emphasizes a design approach where APIs serve as the primary means of linking various applications and enabling connectivity. This characteristic is pivotal because it establishes a systematic way to reuse APIs across different layers of applications, driving agility and efficiency in integration efforts.

By prioritizing APIs over other components, organizations can build modular and easily maintainable systems that allow different teams to work concurrently without dependency bottlenecks. This approach enhances flexibility since APIs act as tangible contracts between services, making it easier to adapt and evolve the infrastructure as business needs change.

In contrast to this focus, centralized control typically relates more to governance than the actual architecture's design principles. The integration of multiple programming languages, while beneficial, is more about implementation specifics rather than a foundational characteristic of API-led connectivity. Lastly, focusing on physical infrastructure would detract from the primary goal of establishing a modular and scalable API strategy, which is vital for maximizing the benefits of a connected architecture.