B. AWS Personal Health Dashboard
Explanation :
AWS Personal Health Dashboard provides alerts for AWS services availability & performance which may impact resources deployed in your account. Customers get emails & mobile notifications for scheduled maintenance activities which might impact services on these AWS resources.
Option A is incorrect as AWS Organizations do not provide any notifications for scheduled maintenance activities.
Option C is incorrect as AWS Trusted Advisor will provide notification on AWS resources created within the account for cost optimization, security, fault tolerance, performance, and service limits. It will not provide notification for scheduled maintenance activities performed by AWS on its resources.
Option D is incorrect as Service Health Dashboard displays the general status of all AWS services & will not display scheduled maintenance activities.
For more information on the AWS Organizations, please refer to the below URL:
https://aws.amazon.com/premiumsupport/technology/personal-health-dashboard/