The correct answer is Azure Databricks.

Azure Databricks provides a managed Apache Spark environment with integrated interactive notebooks that support collaborative data exploration and development. It offers an optimized Spark runtime and workspace features that simplify cluster management and enable teams to work together in notebooks.

Azure Databricks also integrates with Azure storage services and supports Delta Lake for reliable analytics and data engineering. For a retail insights team that wants a managed Spark platform with interactive notebooks and collaboration, this service is purpose built for that scenario.

Azure Synapse Analytics can run Spark pools and includes notebooks, but it is a broader unified analytics platform focused on integrated SQL, data warehousing, and orchestration and it does not provide the same specialized Databricks collaborative workspace experience.

Azure Functions is a serverless event driven compute service for running small pieces of code on demand and it does not provide a managed Apache Spark environment or interactive notebooks for collaborative data exploration.

Azure HDInsight is a managed Hadoop and Spark cluster service, but it requires more cluster administration and it does not deliver the same level of integrated collaborative notebooks and optimized managed Spark runtime that Azure Databricks provides.

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