A large balloon is taken to a shady area and filled with cool air. The balloon is then taken to a bright, sunny location. After a short time, the balloon begins to expand. WHAT explanation does this investigation verify?

as particles gain energy and the material takes up more space

A balloon filled with cool air will rise into the atmosphere

the sunlight had no effect on the balloon

the particles loss energy and the material takes less space
in the bottom choose the correct answer