Answer: Amazon S3

## Explanation **Amazon S3 (Simple Storage Service)** is the correct answer because: 1. **Low-cost storage**: Amazon S3 is designed for cost-effective object storage with various storage classes (Standard, Intelligent-Tiering, Standard-IA, One Zone-IA, Glacier) that offer different price points for different access patterns. 2. **Raw storage**: S3 is an object storage service ideal for storing unstructured data (chunks of data, files, documents, images, videos, etc.) in their raw format. 3. **Manual embedding and retrieval**: S3 provides simple APIs (PUT, GET, DELETE) for manual storage and retrieval of objects, making it perfect for scenarios where users need to manually store and retrieve data chunks. 4. **Scalability**: S3 automatically scales to store virtually unlimited amounts of data. **Why the other options are incorrect**: - **AWS Glue (A)**: This is a serverless data integration service for ETL (Extract, Transform, Load) jobs, not for raw storage. - **Amazon RDS (C)**: This is a managed relational database service for structured data, not for storing raw chunks of data. - **AWS Step Functions (D)**: This is a serverless workflow orchestration service for coordinating multiple AWS services, not a storage service. **Key AWS Service Characteristics**: - **S3**: Object storage for files and unstructured data - **Glue**: ETL and data catalog service - **RDS**: Managed relational databases - **Step Functions**: Workflow orchestration

Author: Ritesh Yadav