Question

which system works similar to a refrigeration system?
a heat pump
a thermostat
a furnace
a heat engine

Explanation:

A heat pump and a refrigeration system both operate on the vapor - compression cycle. In a refrigeration system, the goal is to remove heat from a cold space (like the inside of a fridge). In a heat pump, the goal is to move heat from the outside (a relatively cold space) to the inside (a warmer space) for heating purposes. A thermostat is just a control device to regulate temperature. A furnace is a device to generate heat (usually by burning fuel). A heat engine is a device that converts heat into work (e.g., a car engine), which has a different purpose than a refrigeration system.

Answer:

a heat pump