The suggested answer is D.
In the context of ECS (Elastic Compute Service), the term 'elastic' typically refers to resources such as computing power, storage, and networking that can dynamically scale up or down based on demand. 'Elastic Computing,' 'Elastic Storage,' and 'Elastic Network' are all recognized features of ECS that allow for this scalability. 'Elastic Administration,' however, is not a recognized feature within ECS, making it the correct answer when identifying what 'Elastic' does not refer to in this context.