Answer: Face Comparison

Amazon Rekognition's Face Comparison feature enables identity verification by comparing a face in an image with faces in a reference database. This is used for identity verification scenarios such as user authentication, access control, and identity verification processes. **Explanation of other options:** - **B. Voice Matching**: This is typically part of Amazon Transcribe or other speech services, not Amazon Rekognition - **C. Text-to-Speech**: This is part of Amazon Polly service, not Amazon Rekognition - **D. Key-Phrase Extraction**: This is part of Amazon Comprehend service for natural language processing, not Amazon Rekognition

Author: Ritesh Yadav