The correct answer is A. virtualization.
Virtualization is the process of creating a virtual version of a physical resource, such as a computer, storage device, or network resource. This allows multiple operating systems and applications to run on a single physical machine, which can improve efficiency and reduce costs.
Virtualization is a key technology for cloud computing, as it allows cloud providers to offer a wide range of services on a pay-as-you-go basis. Without virtualization, cloud providers would need to invest in and maintain a large number of physical machines, which would be expensive and inefficient.
B. transubstantiation is the change of one substance into another, especially the change of bread and wine into the body and blood of Christ in the Eucharist. This is a religious concept that is not relevant to cloud computing.
C. cannibalization is the act of consuming one’s own kind. This is a negative term that is not typically used in the context of cloud computing.
D. insubordination is the act of disobeying a superior. This is a negative term that is not typically used in the context of cloud computing.
In conclusion, the correct answer is A. virtualization.