Final answer:
Dynatrace automatically tags entities by utilizing metadata from the underlying infrastructure, which includes details about the software environment and its configurations.
Step-by-step explanation:
Dynatrace is an advanced monitoring solution that automatically tags entities using a variety of information sources. Specifically, Dynatrace uses b) metadata from the underlying infrastructure to tag entities automatically. This metadata can include details about the software environment, configurations, relationships, and dependencies, which are all crucial for understanding the context and the performance of different entities within an IT ecosystem.