Which solution will meet these requirements?
Amazon ElastiCache for Redis cluster
Amazon Aurora MySQL DB cluster
Amazon DynamoDB table
Amazon Neptune DB cluster
Explanations:
Amazon ElastiCache for Redis is primarily used for caching and quick data retrieval, not optimized for highly connected data or complex relationships like a graph database.
Amazon Aurora MySQL is a relational database, which is less efficient for highly connected data compared to graph databases, making it unsuitable for this use case.
Amazon DynamoDB is a NoSQL key-value store that is optimized for fast, scalable access to non-relational data but not for highly connected data or graph-like queries.
Amazon Neptune is a fully managed graph database service optimized for highly connected data and supports IAM policies for secure, restricted access.