Which combination of AWS services and features will provide protection in this scenario?

Explanations:

Amazon Route 53 can provide DNS-level protection against DDoS attacks by distributing traffic across multiple resources and mitigating traffic floods with routing policies.

AWS Shield provides advanced DDoS protection for AWS services like EC2, ELB, and CloudFront, specifically designed to mitigate Layer 3 and Layer 4 attacks.

Elastic Load Balancer (ELB) can distribute incoming traffic, which helps absorb and mitigate DDoS traffic by scaling resources automatically and distributing load evenly across multiple targets.

AWS Certificate Manager (ACM) is for managing SSL/TLS certificates and does not provide direct protection against DDoS attacks.

Amazon S3 is primarily used for object storage and does not provide direct protection for DDoS attacks on web servers.

Amazon GuardDuty is a threat detection service that identifies malicious activity but does not provide direct protection against DDoS attacks like Shield or ELB do.