Varun's response lacks specificity and relevance to the question about utilizing React.js or Angular. Instead of focusing on a specific feature developed using these frameworks, Varun discusses problem identification techniques like root cause analysis and 5Y, which are not directly related to the question. The response does not provide any concrete example of a feature developed or its impact on a project. To improve, Varun could have described a specific project where React.js or Angular was used, detailing the feature developed and its impact, similar to the benchmark response.