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Test-Driven Development (TDD) is a software development practice that emphasizes the creation of automated tests before the actual coding begins. The primary goal of TDD is to ensure that the code meets the requirements and functions as intended. This approach follows a cycle where developers write a test that defines a desired improvement or new function, then write the minimal amount of code necessary to pass that test, and finally refactor the code to meet standards while keeping all tests green (i.e., passing).

By starting with tests, TDD helps clarify the expected behavior of the software, promoting a clearer understanding of requirements and reducing the risk of defects. It encourages incremental development and supports better design by forcing developers to think about how the code will be used before they write it. Ultimately, TDD leads to more reliable and maintainable code, providing a safety net that allows developers to confidently make changes and enhancements.

The other choices do not accurately capture the core principles of TDD. While some may touch on aspects related to software development, they do not specifically address the practice of writing tests before code, which is the essence of TDD.