Your development team is adopting a microservices architecture on GKE. The CTO wants to ensure that if a service fails, it degrades gracefully rather than causing a cascading failure across the entire application. Which architectural pattern should you implement?

In microservices, if Service A calls Service B, and Service B is unresponsive, Service A might exhaust its threads waiting. This causes Service A to fail, leading to a cascading failure. The Circuit Breaker pattern monitors for failures; if the failure rate exceeds a threshold, the circuit 'trips' and immediately returns an error or fallback response, protecting the system.