To ensure EC2 instances remain available even if a natural disaster affects a geographic area, which approach should the company take?

To ensure high availability and disaster recovery against natural disasters affecting a geographic area, a company should use EC2 instances in multiple AWS Regions. AWS Regions are geographically separate and isolated areas, designed to be independent of each other. This isolation means that a natural disaster impacting one Region will not typically affect instances in another, providing the highest level of disaster recovery. Using EC2 instances in multiple Amazon CloudFront locations or multiple edge locations is incorrect because CloudFront and edge locations are primarily for content delivery and caching, not for hosting EC2 instances or providing disaster recovery for compute resources. AWS Local Zones extend an AWS Region into a geographic area closer to users, but they are still tied to a single parent Region and do not offer the same level of disaster isolation as separate Regions.