To ensure every message from Azure Event Grid is processed, which option should you choose?

An Azure Service Bus queue is the best option for ensuring every message from Azure Event Grid is processed because it offers robust messaging capabilities like guaranteed message delivery, message ordering, and dead-lettering. These features are crucial for reliable event processing, as they prevent message loss even if downstream services are temporarily unavailable. While an Azure Event Grid topic is the source of events, it doesn't store messages for reliable processing. Azure Storage queues offer basic queuing but lack advanced features like dead-lettering and guaranteed delivery that Service Bus provides. Azure Logic Apps custom connectors are for integrating with external systems, not primarily for reliable message buffering from Event Grid.