AWS Certified Cloud Practitioner

Explanation

Amazon Neptune is the correct choice because:

• Amazon Neptune is AWS's fully managed graph database service specifically designed for working with highly connected data
• It's optimized for graph queries and can efficiently traverse relationships between data points
• For fraud detection, graph databases excel at identifying patterns and connections between entities (users, transactions, IP addresses, etc.)
• Neptune supports real-time querying capabilities needed for fraud detection scenarios

Why not the other options:

• Amazon DynamoDB: A NoSQL key-value and document database, not optimized for graph relationships
• Amazon RDS: A relational database service for traditional SQL databases, not specialized for graph data
• Amazon Timestream for LiveAnalytics: A time-series database for IoT and operational analytics, not designed for graph data structures

Graph databases like Neptune are particularly well-suited for fraud detection because they can quickly identify suspicious patterns and connections across multiple data points in real-time.