Which cloud computing benefit increases uptime by routing traffic around failures?

High availability ensures that services remain operational even when failures occur. It achieves this by deploying redundant resources and using mechanisms like load balancing and automatic failover to route traffic away from unhealthy components, thereby minimizing downtime and increasing uptime. Elasticity refers to the ability to automatically scale resources up or down to meet demand, which is about performance and resource optimization, not directly about routing around failures. Agility is the ability to respond quickly to changes, focusing on development and deployment speed. Cost efficiency relates to optimizing spending, which is a financial benefit, not a technical mechanism for increasing uptime.