Which of the following reflects a failure to adapt to change or progress?

The term "obsolete" directly refers to something that is no longer in use or has fallen out of relevance due to advancements or changes in technology, ideas, or societal norms. This word conveys a clear sense of failure to adapt to new circumstances, indicating that what was once useful or effective is now outdated.

In contrast, the other options suggest characteristics of being careful, forward-thinking, or introducing new ideas. "Meticulous" implies a careful attention to detail, "progressive" denotes a forward movement towards new ideas or reforms, and "innovative" refers to the introduction of new concepts that reflect adaptability and change. Thus, "obsolete" stands out as the only term that inherently signifies a lack of adaptation to the evolving environment.