The correct option is Amazon Textract. It is the service built to perform OCR on document files such as PDFs so resumes can be converted to searchable text and structured data for downstream analysis.

Amazon Textract extracts plain text and structured elements like forms and tables and it supports large scale and automated workflows so a staffing agency can process tens of thousands of resumes each month.

Amazon Comprehend is incorrect because it performs natural language processing on text that is already available and it is intended to be used after OCR rather than for PDF ingestion.

Amazon Transcribe is incorrect because it converts spoken audio into text and it is not designed to extract text from PDF documents.

Amazon Rekognition is incorrect because it focuses on image and video analysis and it is not the appropriate service for extracting text and document structure from PDFs.

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