Final answer:
To collect events from multiple resources into a centralized repository, Azure Event Hubs is the service to use. It is specifically designed for high-throughput event streaming and ingestion.
Step-by-step explanation:
The Azure service you should use to collect events from multiple resources into a centralized repository is Azure Event Hubs. Azure Event Hubs is a highly scalable data streaming platform and event ingestion service, which can receive and process millions of events per second. Data sent to an Event Hub can be transformed and stored using any real-time analytics provider or batching/storage adapters. Azure Functions is more focused on serverless compute, Azure Logic Apps is used for workflow automation and app integration, and Azure Stream Analytics is a real-time analytics service that can process the data collected by Event Hubs, not ingest it.