Final answer:
Azure Bot Service in Azure supports a digital online assistant that provides speech support.
Step-by-step explanation:
Azure Bot Service
The technology in Azure that supports a digital online assistant providing speech support is Azure Bot Service. Azure Bot Service is a platform for developing and deploying bots to interact with users through various channels, including speech.
Azure Logic Apps, Azure Functions, and Azure Kubernetes Service are all valuable technologies in Azure, but they do not specifically support speech-enabled digital assistants like Azure Bot Service does.