A definite area or space where some thermodynamic process takes place is known as:

I am stepping out of my knowledge zone... I would say a Process, A cycle indicates that it will stay working, a system is not the used term, a law indicates a physical law....

I am quoting following website: https://books.google.de/books?isbn=

• A definite area or space where some thermodynamic process takes place is known as (c) thermodynamic process ...

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I believe it is a thermodynamic system

C thermodynamic process

Thermodynamic Process is a properiat answer