What is a connector in MuleSoft?

A connector in MuleSoft is fundamentally a reusable module that facilitates communication with external systems. Connectors enable Mule applications to integrate with various services and platforms seamlessly. They are designed to encapsulate the underlying logic needed to connect to different systems, whether that’s a database, an API, or a legacy system, and provide a set of operations that can be easily consumed within a Mule project.

Connectors play a crucial role in reducing the complexity involved in integrating different systems. By using connectors, developers can establish interactions with external services without needing to write extensive amounts of custom code. Instead, they can configure the connector's properties and use predefined operations to perform tasks like sending and receiving data.

While other options suggest functionality related to APIs and databases, they do not encapsulate the broader capability of a connector to work across various technologies and services, making "a reusable module that facilitates communication with external systems" the most accurate definition.