Which strategy is effective for ensuring a system’s continuity under adverse conditions?

Redundancy is an effective strategy for ensuring a system's continuity under adverse conditions because it involves having additional or backup components that can take over in the event of a failure. By implementing redundancy in critical systems, organizations can maintain operational uptime and minimize disruptions. For instance, redundant servers can be deployed so that if one server fails, another can seamlessly handle the workload without affecting users. This approach not only supports system reliability but also enhances resilience against unforeseen incidents, such as hardware failures or network issues.

Other strategies like virtualization and scalability offer benefits, such as resource management and flexibility, but they do not directly address the need for immediate backup and continuity in response to adverse conditions. Load balancing, while it helps distribute workloads across multiple resources to optimize performance, similarly does not inherently provide the same level of backup or fault tolerance that redundancy offers. Redundancy specifically focuses on creating multiple instances of critical components, ensuring that there is a fallback option readily available, which is paramount during adverse situations.