which is a liquid that is used to absorb and release thermal energy?\no coolant\no lubricant\no grease\no fuel

Brief Explanations:

• Coolant: Its main function is to absorb heat (thermal energy) from a system (like an engine) and then release that heat (for example, in a radiator). This absorption - release cycle helps in regulating temperature.
• Lubricant (including grease): The primary purpose of a lubricant is to reduce friction between moving parts. While it may have some minor heat - related properties (due to its presence in a system with heat - generating components), heat absorption and release is not its main function.
• Fuel: Fuel is used to produce energy (usually through combustion reactions). It is not designed to absorb and release thermal energy in the way a coolant does.

Answer:

coolant