Answer
The process has heat flow to the surroundings.
Step-by-step explanation
Note that all phase changes are accompanied by changes in the energy of a system. Changes from a more-ordered state to a less-ordered state (such as a liquid to a gas) are endothermic. Changes from a less-ordered state to a more-ordered state (such as a liquid to a solid) are always exothermic.
A melted butter is in liquid phase and is allowed until it changes to solid at room temperature, this change is exothermic and exothermic process is accompanied by releasing heat to the surroundings.
Hence, the only process in the options that is true is:
The process has heat flow to the surroundings.