Which AWS service or tool can provide rightsizing recommendations for Amazon EC2 resources at no additional cost?
AWS Well-Architected Tool
Amazon CloudWatch
AWS Cost Explorer
Amazon S3 analytics
Explanations:
AWS Well-Architected Tool helps identify best practices and architectural improvements but does not provide specific EC2 rightsizing recommendations.
Amazon CloudWatch is a monitoring service that tracks resource utilization and performance metrics but does not offer direct rightsizing recommendations.
AWS Cost Explorer provides rightsizing recommendations for Amazon EC2 instances at no additional cost, helping users optimize resource usage.
Amazon S3 analytics provides insights for S3 storage usage and does not offer rightsizing recommendations for EC2 resources.
I evaluate that the answer is:
AWS Cost Explorer