According to the VMware NSX Documentation, these are two of the use cases for Distributed Intrusion Detection, which is a feature of NSX Network Detection and Response:
Quarantine workloads based on vulnerabilities: You can use Distributed Intrusion Detection to detect vulnerabilities in your workloads and apply quarantine actions to isolate them from the network until they are remediated.
Identify security vulnerabilities in the workloads: You can use Distributed Intrusion Detection to scan your workloads for known vulnerabilities and generate reports that show the severity, impact, and remediation steps for each vulnerability.

Traceflow: This tool helps in troubleshooting network issues by injecting synthetic packets into the network and observing their path. It allows administrators to trace the packet flow across various network segments, making it easier to identify points of packet loss.
Packet Capture: This tool enables detailed inspection of traffic by capturing packets at specific points in the network. It allows administrators to analyze packet headers and payloads to determine if packet loss is occurring and to identify possible causes.

NSX Intelligence is a distributed analytics solution within the VMware NSX Portfolio that provides visibility and dynamic security policy enforcement in NSX environments. It enables detailed traffic analysis, identifies security threats, and helps in the automated creation and enforcement of security policies based on observed network traffic patterns and behaviors.

The field in a Tier-1 Gateway Firewall that would be used to allow access for a collection of trustworthy web sites is Profiles -> L7 Access Profile. This field allows the user to create a Layer 7 access profile that defines a list of allowed or blocked URLs based on categories, reputation, or custom entries1. The user can then apply the L7 access profile to a firewall rule to control the traffic based on the URL filtering criteria1. The other options are incorrect because they are not related to URL filtering. The Source field specifies the source IP address or group of the firewall rule1. The Destination field specifies the destination IP address or group of the firewall rule1. The Profiles -> Context Profiles field allows the user to create a context profile that defines a list of application signatures or attributes that can be used to identify and classify network traffic1.
Reference: Gateway Firewall

https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.2/administration/GUID-0A8BF7D8-9C2E-48A5-8219-17C00F1EC13A.html