Answer: Cost savings via automatic tier adjustments based on access patterns

The Amazon S3 Intelligent-Tiering storage class is designed to optimize storage costs by automatically moving data between two access tiers—frequent access and infrequent access—based on how often the data is accessed. This feature allows for automatic cost savings as the system adjusts the storage tier of objects in response to changes in their access patterns. Therefore, the correct answer is C: 'Automatic cost savings by moving objects between tiers based on access pattern changes'. This storage class is particularly useful for data with unknown or unpredictable access patterns, ensuring that users only pay for the storage tier that best matches their access needs at any given time.

Author: LeetQuiz Editorial Team