Which AWS services or features will meet these requirements?

Explanations:

Placement groups are used to influence the placement of instances for performance reasons, not for chargeback or separating workloads.

Consolidated billing allows organizations to consolidate billing across multiple accounts, making it easier to allocate costs to different departments.

Edge locations are part of the AWS global network for content delivery (via CloudFront) and do not relate to workload chargeback or separation.

AWS Config provides resource configuration tracking and compliance but does not assist in managing chargeback across departments.

Using multiple AWS accounts allows for clear separation of workloads and easier management of costs associated with different departments, facilitating chargeback.