An Azure subscription is required because:
All Finance & Operations environments run on Microsoft Azure
LCS uses the subscription to deploy, manage, and monitor environments
Azure resources such as VMs, storage, and networking are provisioned through it
Without an Azure subscription, environments cannot be deployed.
First read the answer fully, then try to explain it in your own words. After that, open a few related questions and compare the concepts. This method helps you remember the topic for a longer time and improves exam preparation.