Which cloud feature are they implementing?

An IT department is using a number of tools to automate the expansion and contraction of the cloud resource pools.

Which cloud feature are they implementing?
A . Elasticity
B . Monitoring
C . Trust zones
D . Chargeback

Answer: A

Explanation:

The orchestration engine is also the primary interface for service elasticity. If you allow consumers to provision virtual machines dynamically in order to absorb load changes, then they need to have access to the orchestration APIs to make this happen. The orchestration engine can again create and remove services as needed and trigger updates to CMDB and chargeback mechanisms.

https://docs.tibco.com/pub/silver_fabric/5.7.0/doc/html/fabric-introduction/wwhelp/wwhimpl/common/html/wwhelp.htm#context=fabric-introduction&file=fabric-overview.03.2.htm