Which AWS Cloud concept does this requirement represent?

Explanations:

Reliability refers to the ability of a system to consistently perform its intended functions and operate without failure. While important, it does not specifically address the need for delivering features quickly and iteratively.

Elasticity is the ability to automatically scale resources up or down based on demand. This concept supports resource optimization but does not directly relate to the speed of feature delivery.

Agility in cloud computing refers to the ability to adapt quickly to changes, enabling organizations to implement new features and innovations rapidly. This is essential for minimizing time to market, aligning perfectly with the requirement for iterative delivery.

High availability ensures that a system remains operational and accessible for users, minimizing downtime. While it supports reliable service delivery, it does not focus on the speed or iterative nature of feature deployment.