AWS Certified Cloud Practitioner

Explanation

Elasticity is the correct answer because it specifically refers to the cloud's ability to automatically scale computing resources up or down based on demand. This allows organizations to:

• Acquire resources on-demand when needed
• Release resources automatically when they are no longer required
• Scale seamlessly without manual intervention
• Pay only for what you use through this dynamic resource allocation

Why the other options are incorrect:

• Economies of scale: Refers to cost advantages that larger organizations can achieve due to their size and volume, not dynamic resource allocation
• Agility: Refers to the speed and ease with which new IT resources can be provisioned, but doesn't specifically address the automatic scaling aspect
• Security: Refers to the protection of data and systems, not resource scaling capabilities

Elasticity is a fundamental cloud computing characteristic that enables cost optimization and efficient resource utilization in AWS.