Amazon Rekognition is the correct answer because it is AWS's computer vision service that can analyze images and videos to detect objects, scenes, and faces. It has specific capabilities for detecting personal protective equipment (PPE) such as safety glasses, hard hats, face covers, and hand covers in images.

Explanation of why other options are incorrect:

• Amazon Comprehend: This is a natural language processing (NLP) service that analyzes text, not images.
• Amazon Polly: This is a text-to-speech service that converts text into lifelike speech.
• Amazon Kinesis: This is a service for real-time data streaming and processing, not image analysis.

Key Features of Amazon Rekognition for PPE Detection:

1. Can detect various types of PPE including safety glasses, hard hats, face covers, and hand covers
2. Works with images from on-premises cameras
3. Provides confidence scores for each detected PPE item
4. Can be integrated into safety compliance systems
5. Supports real-time analysis for video streams