Which option best describes Hadoop?

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Big data platform and ecosystem. Hadoop is an open-source framework designed to store and process very large data sets by distributing both storage and computation across many machines. It isn’t a traditional relational database; it’s a scalable platform that includes components like a distributed storage layer and a distributed processing engine, plus a family of tools for ingesting, storing, and analyzing data. This combination lets organizations manage and analyze enormous volumes of diverse data using commodity hardware. The other options don’t fit because they describe a single tool or a different purpose (a relational database for structured data, a simple distributed file system for small data, or a data visualization tool), whereas Hadoop encompasses storage, processing, and a broad ecosystem for big data.