What is an essential feature of an API consumer?

An essential feature of an API consumer is the capability to receive API responses. This functionality allows the consumer, which can be applications or services that leverage APIs, to effectively interact with the APIs by sending requests and then processing the responses received.

Without the ability to receive and handle responses, an API consumer would not be able to utilize the data and functionalities that the API provides. This interaction is crucial as it enables the consumer to retrieve information, perform necessary actions, and achieve integration objectives.

While other options like writing documentation, creating databases, and managing network traffic are useful functions, they are not fundamental to the core role of an API consumer. The primary purpose of an API consumer is to make requests to an API and process the responses accordingly, making option B the most relevant and essential feature.