Which AWS service enables users to check for vulnerabilities on Amazon EC2 instances by using predefined assessment templates?

Explanations:

AWS WAF is a web application firewall that helps protect applications against common web exploits.

AWS Trusted Advisor provides recommendations for cost optimization, security, fault tolerance, and performance improvements, but does not perform vulnerability assessments on EC2 instances.

Amazon Inspector is designed to check EC2 instances for vulnerabilities by using predefined assessment templates.

AWS Shield is a managed DDoS protection service and does not perform vulnerability assessments on EC2 instances.