A global e-commerce company uses both Azure and AWS for redundancy and to avoid dependence on a single vendor. What approach is this?

Multi-cloud is the correct answer because it describes the use of multiple cloud computing services from different providers, such as Azure and AWS, to achieve specific objectives like redundancy and vendor independence. This strategy leverages the strengths of various cloud platforms. Public cloud is incorrect because while Azure and AWS are public clouds, the term "public cloud" doesn't specifically address the use of multiple distinct providers. Hybrid cloud is incorrect because it refers to a combination of on-premises infrastructure with at least one public cloud, not multiple public clouds. Virtual cloud is not a standard industry term for this scenario; it might refer to a virtual network within a single cloud, but not the use of multiple providers.