Which AWS service should the company use to meet this requirement?

Explanations:

Amazon Polly is a service that converts text into lifelike speech, primarily used for creating voice applications. It does not provide facial recognition capabilities.

Amazon Transcribe is designed for automatic speech recognition, converting audio to text. It does not offer facial identification features.

Amazon Lex is a service for building conversational interfaces using voice and text. While it deals with natural language processing, it does not support facial recognition.

Amazon Rekognition is a service that provides image and video analysis capabilities, including facial recognition and identification. It is specifically designed for tasks like user verification through facial features.