AWS Certified Cloud Practitioner

Explanation

Amazon Neptune is AWS's fully managed graph database service that is specifically designed for graph database workloads. Here's why it's the correct choice:

• Graph Database: Amazon Neptune is purpose-built for graph databases, which store data as nodes and edges to represent relationships
• Scalable: Neptune automatically scales storage and can handle read replicas for scaling read performance
• Highly Available: It provides high availability through Multi-AZ deployments with automatic failover
• Managed Service: AWS handles the operational aspects like backups, patching, and maintenance

Why the other options are incorrect:

• Amazon Aurora: A relational database compatible with MySQL and PostgreSQL, not a graph database
• Amazon Redshift: A data warehouse service for analytics, not a graph database
• Amazon DynamoDB: A NoSQL key-value and document database, not specifically designed for graph data

For graph database requirements with scalability and high availability, Amazon Neptune is the appropriate AWS service.