The service designed to provide a browser-based integrated development environment is known as AWS Cloud9. It allows developers to collaborate on code in real-time, supports numerous programming languages, and includes direct terminal access to AWS for deploying and debugging applications. The other options, CodeBuild, CodeCommit, and CodePipeline, serve different purposes within the AWS suite—CodeBuild is for compiling and testing code, CodeCommit is for source version control, and CodePipeline streamlines the build, test, and deploy phases with continuous integration and continuous delivery workflows.