How can new machines or those undergoing vMotion be automatically activated to a protected ESXi host?

The correct choice reflects the functionality of Event-Based Tasks in Trend Micro Deep Security Manager, which is designed to allow for automated actions in response to specific events occurring within the environment. When a new machine is introduced or an existing machine goes through a vMotion, the Event-Based Task can trigger the activation of the Deep Security agent on that machine seamlessly and with minimal manual intervention.

This automation is particularly beneficial in maintaining security without introducing delays or human error in the activation process. The Event-Based Task can be configured to respond to events such as the addition of new virtual machines or movements of virtual machines across hosts, allowing for continuous protection in dynamic environments such as virtualized infrastructures.

The other options do not provide the same level of automation or efficiency. Manual activation from the console requires user intervention, which contradicts the need for automation. Network storage options and vMotion settings focus on the functionality of the virtual infrastructure but do not inherently integrate with Deep Security management tasks to facilitate automated protection activation. Therefore, setting up an Event-Based Task represents the most effective and streamlined approach for managing security in response to changes in the environment.