The correct answer is 'To provide system fault tolerance.' Implementing redundancy in cloud environments ensures that if one component fails, another can take over, thus maintaining the operation of the service without interruption. Redundancy is not primarily for data preservation, which is more closely achieved through backups and replication. It is not for load balancing, which distributes workloads across multiple computing resources, nor is it specifically for optimizing performance or reducing latency, which are secondary benefits in some redundant designs.