Implementing Amazon ElastiCache with an appropriate eviction policy, such as Least Recently Used (LRU), can cache dynamic content without modifying the database. LRU is an effective eviction policy for dynamic content where older, less-frequently accessed items are removed to make space for new items, helping to serve high read demand while keeping content relatively fresh. Using AWS Global Accelerator would optimize the routing to the application but will not reduce database load. Using a larger database instance size and enabling cross-region replication would increase the capacity for read/write operations but would not effectively address the caching requirement for dynamic content.