There is an external audit being carried out on your company. The IT auditor needs to have a log of `who made the requests` to the AWS resources in the company’s account. Which of the below services can assist in providing these details?

Answer options:

A.AWS Cloudwatch
B.AWS CloudTrail
C.AWS EC2
D.AWS SNS

Answer - B
Using CloudTrail, one can monitor all the API activity conducted on all AWS services.
The AWS Documentation additionally mentions the following.
AWS CloudTrail is a service that enables governance, compliance, operational auditing, and risk auditing of your AWS account. With CloudTrail, you can log, continuously monitor, and retain account activity related to actions across your AWS infrastructure. CloudTrail provides event history of your AWS account activity, including actions taken through the AWS Management Console, AWS SDKs, command line tools, and other AWS services. This event history simplifies security analysis, resource change tracking, and troubleshooting.
For more information on AWS Cloudtrail, please refer to the below URL:
https://aws.amazon.com/cloudtrail/