Final answer:
The student's question is 'b. Environment Variables, Unique, Specific, Environment'. Environment Variables are used to abstract and manage configuration details that are unique to each development or deployment environment, improving the security and maintainability of the application.
Step-by-step explanation:
Environment Variables are designed to contain values that are unique to a specific environment, such as Salesforce Ids, integration endpoints, or usernames, and allow you to make commits, deployments, and branch validations environment-agnostic. The correct answer to the question is 'b. Environment Variables, Unique, Specific, Environment'.
Environment variables offer a way to abstract configuration details that vary between different environments without changing the application's source code. This can be incredibly useful in software development and deployment processes. For instance, a database connection string might be different in a developer's local environment compared to the production environment. Using environment variables, the developer can configure their application to use the appropriate connection string for each environment without modifying the source code directly, thus making the process more secure and maintainable.