Elastic Beanstalk

Hi ，
You can terminate a running AWS Elastic Beanstalk environment using the Elastic Beanstalk console. By doing this, you avoid incurring charges for unused AWS resources[1].

If you terminate an environment, you must also delete any CNAME mappings that you created, as other customers can reuse an available hostname. Be sure to delete DNS records that point to your terminated environment to prevent a dangling DNS entry. A dangling DNS entry can expose internet traffic destined for your domain to security vulnerabilities. It can also present other risks.

And you can save your configuration[2].

[1]https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.terminating.html
[2]https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/environment-configuration-savedconfig.html