To identify the arrows that represent the removal of thermal energy when matter changes state, we look for changes that suggest a cooling process (going from gas to liquid or liquid to solid).

In this case:

• The arrow pointing from the gaseous state (far right) to the liquid state (middle) represents condensation, which involves the removal of thermal energy.
• The arrow pointing from the liquid state (middle) to the solid state (far left) represents freezing, which also involves the removal of thermal energy.

Therefore, both arrows pointing left (from gas to liquid and from liquid to solid) show the removal of thermal energy during changes in the state of matter.