Deploy a CPU and memory monitoring tool from AWS Marketplace across all EC2 instances, store the collected data in Amazon S3, and develop a Python script to pinpoint underutilized instances. Use EC2 pricing data to formulate recommendations for instance downsizing.

Utilize AWS Systems Manager to install the Amazon CloudWatch agent on all EC2 instances. Obtain resource optimization recommendations from AWS Cost Explorer within the organization’s management account and apply these insights to downsize underutilized instances across all accounts.

Employ AWS Systems Manager to install the Amazon CloudWatch agent on all EC2 instances. Access resource optimization recommendations from AWS Cost Explorer for each individual account within the organization and implement these recommendations to downsize underutilized instances across all accounts.

Install the Amazon CloudWatch agent on all EC2 instances via AWS Systems Manager. Develop an AWS Lambda function to gather CPU and memory usage data from all instances, store this data in Amazon S3, and utilize Amazon Athena to identify underutilized instances. Refer to EC2 pricing data to generate recommendations for instance downsizing.