Final answer:
Black-box testing uses requirements specifications as a test basis by focusing on what the software is supposed to do rather than how it does it, making it the answer to the student's question.
Step-by-step explanation:
The test technique that uses the requirements specifications as a test basis is Black-box testing. This type of testing focuses on the external workings of the software, that is, what it is supposed to do, rather than how it does it. This aligns with the concept of utilizing requirements specifications, which describe the expected behavior and functionality of a system without detailing the internal implementation. Therefore, the requirements provide the criteria for designing test cases in Black-box testing.