Which is a key feature that Advanced Malware Protection provides?

Dynamic Content Analysis is a feature associated with Cisco web security proxies (WSA/Secure Web Appliance) for inspecting web content, not a primary AMP capability.

Reputation Analytics is one input into AMP's file disposition engine but is not the key differentiating feature that sets AMP apart from traditional antivirus.

Retrospective Security is the defining feature of AMP because it maintains a continuous relationship with every file seen on an endpoint. If a file that was initially deemed safe later exhibits malicious behavior or new threat intelligence identifies it as malware, AMP can retroactively alert on and remediate the threat, closing the gap that point-in-time solutions leave open.

Dynamic URL Filtering is a web gateway feature used to categorize and block URLs, unrelated to endpoint malware analysis.