Final answer:
Telepresence is not an essential characteristic of the cloud model; rather, on-demand self-service, resource pooling, and rapid elasticity are core features of cloud computing.
Step-by-step explanation:
Among the options listed, telepresence is NOT an essential characteristic of the cloud model. Cloud computing typically includes essential characteristics such as on-demand self-service, resource pooling, and rapid elasticity. Telepresence, however, refers to a set of technologies which allow a person to feel as if they were present, to give the appearance of being present, or to have an effect, via telerobotics, at a place other than their true location, and is not a fundamental characteristic of cloud computing.