Amazon Inspector is an automated security assessment service that helps improve the security and compliance of applications deployed on AWS. It automatically assesses applications for software vulnerabilities and unintended network exposure, providing detailed security findings prioritized by level of severity.

Key features of Amazon Inspector:

• Software vulnerability scanning: Identifies software vulnerabilities in EC2 instances and container images
• Network exposure assessment: Checks for unintended network accessibility of EC2 instances
• Automated security assessments: Continuously scans workloads as they are deployed
• Prioritized findings: Provides risk scores and recommendations for remediation

Other services comparison:

• AWS Security Hub: Provides a comprehensive view of security alerts and compliance status across AWS accounts
• AWS Shield: A managed DDoS protection service
• AWS Trusted Advisor: Provides best practice recommendations for cost optimization, performance, security, and fault tolerance

Amazon Inspector is specifically designed for vulnerability assessment and network exposure scanning, making it the correct choice for this question.