Answer: Spark

**Explanation:** Cloud Dataproc is a managed Apache Spark and Apache Hadoop service that lets you use open source data tools for batch processing, querying, streaming, and machine learning. Key features: - **Managed service** - Google handles cluster management, configuration, and maintenance - **Apache Spark** - for fast, in-memory data processing and analytics - **Apache Hadoop** - for distributed storage and processing - Supports various data processing workloads including batch, querying, streaming, and ML - The other options (Blaze, Fire, Ignite) are not the correct Apache projects that Dataproc manages

Author: LeetQuiz .