A company is deploying a web service to Amazon EC2 instances behind an Elastic Load Balancer. All resources will be defined and created in a single AWS CloudFormation stack using a template. The creation of each EC2 instance will not be considered complete until an initialization script has been run successfully on the EC2 instance. The Elastic Load Balancer cannot be created until all EC2 instances have been created.

Which CloudFormation resource will coordinate the Elastic Load Balancer creation in the CloudFormation stack template?