Which AWS service is designed to search and find text within documents stored in Amazon S3?

Amazon Kendra is an intelligent enterprise search service that uses machine learning to allow users to search and find text within documents, including those stored in Amazon S3. It provides a highly accurate and easy-to-use search experience across various content repositories. Amazon Rekognition is an image and video analysis service, not for text search within documents. Amazon Polly is a text-to-speech service, converting written text into lifelike speech. Amazon Lex is a service for building conversational interfaces (chatbots), not for document search.