Which of the following data sources makes online data consumption easier?

A data mart is a subset of a data warehouse, optimized for specific departments or business functions, and while it provides structured data, it's typically accessed via analytical tools rather than directly enabling 'online data consumption' in the programmatic sense of an API.

Web scraping involves extracting data from websites, which can be complex, unreliable due to website changes, and often violates terms of service, making it a difficult method for easy and reliable online data consumption.

A database stores data, but direct online consumption from a raw database often requires specific connection details, query languages, and security configurations, which is less straightforward for general online consumption compared to an API endpoint.

An Application Programming Interface (API) is designed to allow different software systems to communicate and exchange data easily over a network, making online data consumption structured, programmatic, and efficient. APIs provide well-defined methods for requesting and receiving data, simplifying integration and real-time access.