In the .ebextensions folder at the root of the source bundle is correct because Elastic Beanstalk reads and applies .config option files that are placed in that directory during deployment.

Elastic Beanstalk scans the root .ebextensions directory for files ending in .config and uses those files to set environment options and create or modify resources. Placing your lb-settings.config under .ebextensions ensures the platform processes the load balancer settings when it provisions the environment.

Inside the .platform/hooks directory is incorrect because the .platform/hooks area is intended for lifecycle scripts and platform customization and it does not serve as the location Elastic Beanstalk scans for option .config files.

In a bin directory within the project is incorrect because Elastic Beanstalk does not read deployment option files from arbitrary project folders such as a bin folder.

Directly in the top-level of the source bundle is incorrect because option .config files must live under .ebextensions at the bundle root to be recognized and applied by Elastic Beanstalk.

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