On a cool morning, uyen’s breath can form a cloud when she breathes out. which changes of state are most responsible for uyen seeing her breath in this way?

The heat from Uyen's breathe causes heer to see her breathe visibly. The state that is responsible for it though is Vaporization and Condensation.

I hope this helps! (^_^)

Vaporization and Condensation

Explanation:

Our bodies contain water. When air passes through our body it comes into contact with the water which makes our breath to store moisture. This results in the vaporization process.

If it is cold outside the gaseous water molecules in our breath start accumulating in atomic/molecular clusters which then turns into the breath we are able to see. This process is known as condensation.