Question

For water to change from a liquid to a solid, thermal energy needs to be added or taken

Answer 1

Thermal energy needs to be taken.

Step-by-step explanation:

For water to change from a liquid to a solid, it needs to be cooled down.

Lowering the temperature of a substance means that thermal energy needs to be taken away from it.

Conversely, for water to change from a solid to a liquid, or from a liquid to a gas, thermal energy needs to be added to it.